O'Connor, J. D., & Fletcher, C. (1990). Sounds English: A pronunciation practice book. TP. HCM: Tổng hợp.
Styl cytowania ChicagoO'Connor, J. D., i Clare Fletcher. Sounds English: A Pronunciation Practice Book. TP. HCM: Tổng hợp, 1990.
Styl cytowania MLAO'Connor, J. D., i Clare Fletcher. Sounds English: A Pronunciation Practice Book. TP. HCM: Tổng hợp, 1990.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..