Cita APA (7a ed.)

Richards, J. C. (1993). Interchange: English for international communication: lab guide. 1.

Cita Chicago Style (17a ed.)

Richards, Jack C. Interchange: English for International Communication: Lab Guide. 1. Cambridge, 1993.

Cita MLA (9a ed.)

Richards, Jack C. Interchange: English for International Communication: Lab Guide. 1. 1993.