Gaya APA

Azar, B, S., Hartle, S. (2006). Basic English grammar (ed.3) (ed.3). New Yoork: Pearson Education.

Gaya MLA

Azar, Betty, Schrampfer., Hartle, Shellley. "Basic English grammar (ed.3)". ed.3 New Yoork: Pearson Education, 2006. Text.