एपीए उद्धरण

O'Connor, J. D., & Fletcher, C. (1990). Sounds English: A pronunciation practice book. TP. HCM: Tổng hợp.

शिकागो स्टाइल उद्धरण

O'Connor, J. D., और Clare Fletcher. Sounds English: A Pronunciation Practice Book. TP. HCM: Tổng hợp, 1990.

एमएलए उद्धरण

O'Connor, J. D., और Clare Fletcher. Sounds English: A Pronunciation Practice Book. TP. HCM: Tổng hợp, 1990.