Gaya APA

MURPHY, R. (1990). ESSENTIAL GRAMMAR IN USE: A Self Study Reference and Practice Book for Elementary Students of English With Answers . New York: CAMBRIDGE UNIVERSITY PRESS.

Gaya MLA

MURPHY, R.. "ESSENTIAL GRAMMAR IN USE: A Self Study Reference and Practice Book for Elementary Students of English With Answers". New York: CAMBRIDGE UNIVERSITY PRESS, 1990. Text.