Cita APA (7a ed.)

Allan, D., & Clark, T. (2001). Surprise! primary: Course book.

Cita Chicago Style (17a ed.)

Allan, David, y Tessa Clark. Surprise! Primary: Course Book. Atenas, 2001.

Cita MLA (9a ed.)

Allan, David, y Tessa Clark. Surprise! Primary: Course Book. 2001.