Gaya APA

AZAR, B, S., A.HAGEN, S. (2006). BASIC ENGLISH GRAMMAR (3). NEWYORK: LONGMAN.

Gaya MLA

AZAR, BETTY, SCHRAMPFER., A.HAGEN, STACY. "BASIC ENGLISH GRAMMAR". 3 NEWYORK: LONGMAN, 2006. Text.