Cita APA (7a ed.)

O'Connor, J. D., Fletcher, C., & Kenworthy, J. (1996). Sounds English: A pronunciation practice book (1st published, 8th impression.). Longman.

Cita Chicago Style (17a ed.)

O'Connor, Joseph Desmond, Clare Fletcher, y Joanne Kenworthy. Sounds English: A Pronunciation Practice Book. 1st published, 8th impression. London [etc.]: Longman, 1996.

Cita MLA (9a ed.)

O'Connor, Joseph Desmond, et al. Sounds English: A Pronunciation Practice Book. 1st published, 8th impression. Longman, 1996.