Gaya APA

Azar, B, S., Hagen, S, A. (2006). Basic English Grammar : With Answer Key (Third Edition). : Pearson Longman.

Gaya MLA

Azar, Betty, Schrampfer., Hagen, Stacy, A.. "Basic English Grammar : With Answer Key". Third Edition : Pearson Longman, 2006. Text.