Cita APA (7th ed.)

Wallwork, A. (1997). Discussions A-Z advanced: A resource book of speaking activities. University of Cambridge.

Cita Chicago (17th ed.)

Wallwork, Adrian. Discussions A-Z Advanced: A Resource Book of Speaking Activities. Cambridge: University of Cambridge, 1997.

Cita MLA (9th ed.)

Wallwork, Adrian. Discussions A-Z Advanced: A Resource Book of Speaking Activities. University of Cambridge, 1997.