Cita APA (7a ed.)

Sinclair, B., & Prowse, P. (1996). Activate your english: Intermediate coursebook (1ª ed.).

Cita Chicago Style (17a ed.)

Sinclair, Barbara, y Philip Prowse. Activate Your English: Intermediate Coursebook. 1ª ed. Cambridge, 1996.

Cita MLA (9a ed.)

Sinclair, Barbara, y Philip Prowse. Activate Your English: Intermediate Coursebook. 1ª ed. 1996.