Gaya APA

Azar, B, S. (1981). Understanding and using english grammar (Cet. 10, Ed. 2). New Jersey: Prentice-Hall.

Gaya MLA

Azar, Betty, Schrampfer. "Understanding and using english grammar". Cet. 10, Ed. 2 New Jersey: Prentice-Hall, 1981. Text.