Roach, P. J. (1989). English phonetics and phonology: A practical course: tutor's book. Cambridge University.
Citazione stile Chigago Style (17a edizione)Roach, Peter John. English Phonetics and Phonology: A Practical Course: Tutor's Book. Cambridge: Cambridge University, 1989.
Citatione MLA (9a ed.)Roach, Peter John. English Phonetics and Phonology: A Practical Course: Tutor's Book. Cambridge University, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.