2 Characteristic Difficulties with English for Speakers of Korean

Source: https://web.utk.edu/~wiley/SETESOL2007_CK_Specific_American_English_Pronunciation_Challenges_for_ELLs.pdf

1 International Phonetic Alphabet

Source: http://www.oxfordlearnersdictionaries.com/us/about/pronunciation_english

Supplementary learning resource/s: http://soundsofspeech.uiowa.edu/english/english.html