APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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