Cita APA (7a ed.)

Wallwork, A. Discussions A-Z, intermediate. A resource book of speaking activities (10a ed.).

Cita Chicago Style (17a ed.)

Wallwork, Adrian. Discussions A-Z, Intermediate. A Resource Book of Speaking Activities. 10a ed.

Cita MLA (8a ed.)

Wallwork, Adrian. Discussions A-Z, Intermediate. A Resource Book of Speaking Activities. 10a ed.