Gaya APA

Azar, B, S., Hagen, S, A. (2006). Basic English Grammar with Answer Key 3th Ed. . New York: Pearson Longman.

Gaya MLA

Azar, Betty, Schrampfer., Hagen, Stacy, A.. "Basic English Grammar with Answer Key 3th Ed.". New York: Pearson Longman, 2006. Text.