参考資料

●実際の発音が聞けるサイト

https://www.thefreedictionary.com/
https://dictionary.cambridge.org/dictionary/british/
単語を入力すると、アメリカ、イギリスの国旗アイコンが現れ、それをクリックすることで、それぞれの発音が聞ける。

https://fonetiks.org/index.html
各国の英語を選び、発音記号をマウスオーバーするとその発音を含んだ単語の発音が聞ける。

https://www.bl.uk/learning/langlit/sounds/
地図中の人間のアイコンをクリックすることで、イギリス、スコットランド、アイルランド、ウェールズにおける各地域のスピーチが聞ける。

https://www.excite.co.jp/dictionary/
エキサイト辞書のサイト。発音記号はIPA方式を採用。

https://dictionary.goo.ne.jp/
goo辞書のサイト。発音記号はジョーンズ方式を採用。

●参考資料

https://en.wikipedia.org/wiki/Help:IPA
https://en.wikipedia.org/wiki/English_phonology
https://en.wikipedia.org/wiki/IPA_chart_for_English
https://en.wikipedia.org/wiki/Rhotic_and_non-rhotic_accents
https://en.wikipedia.org/wiki/Rhoticity_in_English
https://en.wikipedia.org/wiki/Fortis_and_lenis
https://en.wikipedia.org/wiki/Intrusive_R
https://www.fact-archive.com/encyclopedia/Phonemic_differentiation
https://en.wikipedia.org/wiki/Vowel_length
https://www.deanesmay.com/posts/1126251401.shtml
https://en.wikipedia.org/wiki/International_Phonetic_Alphabet_chart_for_English_dialects
https://en.wikipedia.org/wiki/Phonological_history_of_English_short_A#.2F.C3.A6.2F_tensing
https://en.wikipedia.org/wiki/Phonological_history_of_English_consonants
https://en.wikipedia.org/wiki/English_consonant-cluster_reductions
https://en.wikipedia.org/wiki/Phonological_history_of_wh
https://en.wikipedia.org/wiki/Phonological_history_of_English_vowels
https://en.wikipedia.org/wiki/Phonological_history_of_English_high_front_vowels
https://en.wikipedia.org/wiki/Phonological_history_of_the_high_back_vowels
https://en.wikipedia.org/wiki/Phonological_history_of_English_low_back_vowels
https://en.wikipedia.org/wiki/English-language_vowel_changes_before_historic_r
https://en.wikipedia.org/wiki/English-language_vowel_changes_before_historic_l
https://en.wikipedia.org/wiki/Phonological_history_of_English_diphthongs
https://en.wikipedia.org/wiki/Flapping
https://en.wikipedia.org/wiki/Intervocalic_alveolar_flapping
https://en.wikipedia.org/wiki/T_glottalization
https://en.wikipedia.org/wiki/Palatalization
https://en.wikipedia.org/wiki/Talk%3APalatalization
https://en.wikipedia.org/wiki/Voiceless_velar_fricative
https://en.wikipedia.org/wiki/Voiceless_alveolar_non-sibilant_fricative
https://en.wikipedia.org/wiki/Velarisation
https://usadultliteracy.wordpress.com/category/pronunciation/
https://orb.essex.ac.uk/lg/lg405/jspurl/variable.htm
https://www.yorku.ca/earmstro/courses/phonetics/lexical_sets.pdf
https://www.bl.uk/learning/langlit/sounds/
https://en.wikipedia.org/wiki/American_English
https://en.wikipedia.org/wiki/General_American
https://www.mnsu.edu/comdis/phonetics/phonetics.html
https://faculty.washington.edu/dillon/PhonResources/vowels.html
https://commons.wikimedia.org/wiki/File:California_English_vowel_chart.svg
https://en.wikipedia.org/wiki/British_English
https://www.yaelf.com/rp.shtml
https://en.wikipedia.org/wiki/Received_Pronunciation
https://en.wikipedia.org/wiki/American_and_British_English_pronunciation_differences
https://www.wikihow.com/Speak-in-a-British-Accent
https://www.youtube.com/watch?v=52trwsDoj_8
https://en.wikipedia.org/wiki/Canadian_English#Phonemic_incidence
https://en.wikipedia.org/wiki/Canadian_raising
https://www.ualberta.ca/~annemich/101_Phonetics2_Appendix.pdf
https://en.wikipedia.org/wiki/Canadian_Shift
https://ic-migration.webhost.uits.arizona.edu/icfiles/ic/lsp/site/Canadian/canphon1.html
https://www.antimoon.com/
https://en.wikipedia.org/wiki/Australian_English_phonology
https://alannat1.podomatic.com/entry/2007-07-31T21_41_50-07_00
https://faculty.washington.edu/dillon/PhonResources/kiwisounds/NewZealandPronunciation.html
https://en.wikipedia.org/wiki/New_Zealand_English
https://www.stuff.co.nz/4654149a1861.html
https://en.wikipedia.org/wiki/Scottish_English
https://www.scots-online.org/grammar/sse.htm
https://www.wikihow.com/Talk-With-a-Scottish-Accent
https://www.youtube.com/watch?v=mALkCGVA2BU
https://www.bl.uk/learning/langlit/sounds/find-out-more/northern-ireland/
https://en.wikipedia.org/wiki/Hiberno-English
https://www.uni-due.de/IERC/index.html
https://www.wikihow.com/Speak-With-an-Irish-Accent
https://www.youtube.com/watch?v=W2PHch4IPPQ
https://en.wikipedia.org/wiki/Welsh_English
https://homes.chass.utoronto.ca/~cpercy/courses/6362-martin.htm
https://www.youtube.com/watch?v=cq-mEejECcU
https://www.grin.com/en/e-book/52581/linguistic-features-of-welsh-english
https://ja.wikipedia.org/wiki/日本語の音韻
Accents of English (By John C. Wells; Cambridge University Press)
New Zealand English (By Allan Bell, Koenraad Kuiper; John Benjamins Publishing)