Cita APA

Blackwell, A., & Naber, T. (2007). Open forum 1: Academic listening and speaking. New York, NY: Oxford University Press.

Citación estilo Chicago

Blackwell, Ángela, y Therese Naber. Open Forum 1: Academic Listening and Speaking. New York, NY: Oxford University Press, 2007.

Cita MLA

Blackwell, Ángela, y Therese Naber. Open Forum 1: Academic Listening and Speaking. New York, NY: Oxford University Press, 2007.