Cita APA (7a ed.)

Harding, K., & Taylor, L. (2005). International express: Intermediate (Interactive ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Harding, Keith, y Liz Taylor. International Express: Intermediate. Interactive ed. Oxford: Oxford University Press, 2005.

Cita MLA (8a ed.)

Harding, Keith, y Liz Taylor. International Express: Intermediate. Interactive ed. Oxford University Press, 2005.