Gaya APA

Azar, B, S. (2002). Fundamentals of English Grammar : third edition with answer key / Betty Schrampfer Azar (3 rd Edition). Amerika: Longman.

Gaya MLA

Azar, Betty, Schrampfer. "Fundamentals of English Grammar : third edition with answer key / Betty Schrampfer Azar". 3 rd Edition Amerika: Longman, 2002. Text.