Gaya APA

Azar, B, S. (1989). Understanding and using english grammar: second edition (Ed. 2rd). United State of America: Tina B. Caver.

Gaya MLA

Azar, Betty, Schrampfer. "Understanding and using english grammar: second edition". Ed. 2rd United State of America: Tina B. Caver, 1989. Text.