Gaya APA
Murphy, R. (1990).
Essential Grammar in Use: Aself-Study reference and pratice book for elementary students of english (Ed.2).
Sydney:
Cambridge University Press.
Gaya MLA
Murphy, Raymond.
"Essential Grammar in Use: Aself-Study reference and pratice book for elementary students of english".
Ed.2
Sydney:
Cambridge University Press,
1990.
Text.