Cita APA

Duncan, J., & Parker, A. (2007). Open forum 3: Academic listening and speaking. Student book. New York: Oxford University Press.

Citación estilo Chicago

Duncan, Janie, y Amy Parker. Open Forum 3: Academic Listening and Speaking. Student Book. New York: Oxford University Press, 2007.

Cita MLA

Duncan, Janie, y Amy Parker. Open Forum 3: Academic Listening and Speaking. Student Book. New York: Oxford University Press, 2007.