Cita APA

Kerr, P. (2012). Straightforward: Pre-intermediate student's book. Oxford: Macmillan.

Citación estilo Chicago

Kerr, Philip. Straightforward: Pre-intermediate Student's Book. Oxford: Macmillan, 2012.

Cita MLA

Kerr, Philip. Straightforward: Pre-intermediate Student's Book. Oxford: Macmillan, 2012.