APA (7. basım) Alıntı

Obee, B. (1998). Cambridge first certificate: Grammar and usage. Cambridge University Press.

Chicago Style (17. basım) Atıf

Obee, Bob. Cambridge First Certificate: Grammar and Usage. Cambridge: Cambridge University Press, 1998.

MLA (8th ed.) Atıf

Obee, Bob. Cambridge First Certificate: Grammar and Usage. Cambridge University Press, 1998.