Cita APA (7th ed.)

Clandfield L. Lindsay. (2006). Straightforward. Elementary: Student's Book. Oxford, Macmillan, 2006.

Cita Chicago (17th ed.)

Clandfield L. Lindsay. Straightforward. Elementary: Student's Book. Oxford, Macmillan, 2006, 2006.

Cita MLA (9th ed.)

Clandfield L. Lindsay. Straightforward. Elementary: Student's Book. Oxford, Macmillan, 2006, 2006.