Richards, J. C., & Bohlke, D. (2012). Speak now 1: Communicate with confidence. New York: Oxford University Press.
Trích dẫn kiểu ChicagoRichards, Jack C., và David Bohlke. Speak Now 1: Communicate With Confidence. New York: Oxford University Press, 2012.
MLA citiranjeRichards, Jack C., và David Bohlke. Speak Now 1: Communicate With Confidence. New York: Oxford University Press, 2012.
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