Gaya APA

AZAR, B, S., HAGEN, S, A. (2006). BASIC ENGLISH GRAMMAR WITH ANSWER KEY . New York: PEARSON EDUCATION.

Gaya MLA

AZAR, BETTY, SCHRAMPFER., HAGEN, STACY, A.. "BASIC ENGLISH GRAMMAR WITH ANSWER KEY". New York: PEARSON EDUCATION, 2006. Art Original.