Richards, J. C., Hull, J., & Proctor, S. (1991). Interchange: English for international communication. Cambridge ; New York: Cambridge University Press.
استشهاد بنمط شيكاغوRichards, Jack C., Jonathan Hull, و Susan Proctor. Interchange: English for International Communication. Cambridge ; New York: Cambridge University Press, 1991.
MLA استشهادRichards, Jack C., Jonathan Hull, و Susan Proctor. Interchange: English for International Communication. Cambridge ; New York: Cambridge University Press, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.