Cita APA (7a ed.)

DOFF, A., & BECKET, C. (1993). Listening 1. Canbridge University Press.

Cita Chicago Style (17a ed.)

DOFF, Adrian, y Carolyn BECKET. Listening 1. New York: Canbridge University Press, 1993.

Cita MLA (9a ed.)

DOFF, Adrian, y Carolyn BECKET. Listening 1. Canbridge University Press, 1993.