Gaya APA
MURPHY, R. (1997).
Essential grammar in use: a self study reference and practice book for elementary students of English / Raymond Murphy (Ed. 2).
:
Erlangga.
Gaya MLA
MURPHY, Raymond.
"Essential grammar in use: a self study reference and practice book for elementary students of English / Raymond Murphy".
Ed. 2
:
Erlangga,
1997.
Referensi.