Cita APA

Hadfield, J., & Hadfield, C. (1999). Simple listening activities. Oxford: Oxford University Press.

Citación estilo Chicago

Hadfield, Jill, y Charles Hadfield. Simple Listening Activities. Oxford: Oxford University Press, 1999.

Cita MLA

Hadfield, Jill, y Charles Hadfield. Simple Listening Activities. Oxford: Oxford University Press, 1999.