Cita APA (7a ed.)

Capel A. Annette & Sharp W. Wendy. (2003). Objective first certificate. Student"s Book (7th ed.). New York, Cambridge University Press, 2003.

Cita Chicago Style (17a ed.)

Capel A. Annette y Sharp W. Wendy. Objective First Certificate. Student"s Book. 7th ed. New York, Cambridge University Press, 2003, 2003.

Cita MLA (9a ed.)

Capel A. Annette y Sharp W. Wendy. Objective First Certificate. Student"s Book. 7th ed. New York, Cambridge University Press, 2003, 2003.