Cita APA

Harding, K., & Wallwork, A. (2008). International express: Student's book upper-intermediate. New York, Estados Unidos de América: Oxford University Press.

Citación estilo Chicago

Harding, Keith, y Adrian Wallwork. International Express: Student's Book Upper-intermediate. New York, Estados Unidos de América: Oxford University Press, 2008.

Cita MLA

Harding, Keith, y Adrian Wallwork. International Express: Student's Book Upper-intermediate. New York, Estados Unidos de América: Oxford University Press, 2008.