Gaya APA

Murphy, R., Smalzer, W, R. (2013). Basic Grammar in Use, Reference and Pratice for Students of North American English . New York: Cambidge University Press.

Gaya MLA

Murphy, Raymond., Smalzer, William, R.. "Basic Grammar in Use, Reference and Pratice for Students of North American English". New York: Cambidge University Press, 2013. Text.