Dyfyniad APA
Roach, P. (1991). English phonetics and phonology: A practical course (2nd ed.). Cambridge.
Dyfyniad Arddull Chicago
Roach, Peter. English Phonetics and Phonology: A Practical Course. 2nd ed. New York: Cambridge, 1991.
Dyfyniad MLA
Roach, Peter. English Phonetics and Phonology: A Practical Course. 2nd ed. Cambridge, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.