Gaya APA

Azar, B, S., Hagen, S, A. (2006). Basic english grammar : with Aswer key; Third Edition (Third Edition). White Plains, NY: Pearson Longman.

Gaya MLA

Azar, Betty, Schrampfer., Hagen, Stacy, A.. "Basic english grammar : with Aswer key; Third Edition". Third Edition White Plains, NY: Pearson Longman, 2006. Text.