Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.