Gaya APA

Murphy, R. (1990). Essential Grammar in Use (With Answers) A self-study reference and practice book for elementary students of English . New York: University Of Cambridge Local Exami Nations Syndiante.

Gaya MLA

Murphy, Raymond. "Essential Grammar in Use (With Answers) A self-study reference and practice book for elementary students of English". New York: University Of Cambridge Local Exami Nations Syndiante, 1990. Text.