Dyfyniad APA

Percil, J., & Gray, J. (1988). Prospects: An advanced course teacher's book. Penguin Books.

Dyfyniad Arddull Chicago

Percil, John, and Joanna Gray. Prospects: An Advanced Course Teacher's Book. London: Penguin Books, 1988.

Dyfyniad MLA

Percil, John, and Joanna Gray. Prospects: An Advanced Course Teacher's Book. Penguin Books, 1988.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.