Gaya APA
MURPHY, R. (1987).
English Grammar in Use: A refence and practice book for intermediate students / Raymond Murphy (Cet.6).
:
cambridge university press.
Gaya MLA
MURPHY, Raymond.
"English Grammar in Use: A refence and practice book for intermediate students / Raymond Murphy".
Cet.6
:
cambridge university press,
1987.
Referensi.