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.