Cita APA

May, P., & Martin, J. (1999). Knockout first certificate: Teacher's book (2nd ed.). Oxford: Oxford U. P..

Citación estilo Chicago

May, Peter, y Jackie Martin. Knockout First Certificate: Teacher's Book. 2nd ed. Oxford: Oxford U. P., 1999.

Cita MLA

May, Peter, y Jackie Martin. Knockout First Certificate: Teacher's Book. 2nd ed. Oxford: Oxford U. P., 1999.