Cita APA (7th ed.)

Roach, P. J. (1989). English phonetics and phonology: A practical course: tutor's book. Cambridge University.

Cita Chicago (17th ed.)

Roach, Peter John. English Phonetics and Phonology: A Practical Course: Tutor's Book. Cambridge: Cambridge University, 1989.

Cita MLA (9th ed.)

Roach, Peter John. English Phonetics and Phonology: A Practical Course: Tutor's Book. Cambridge University, 1989.