Gaya APA

Azar, B, S., Hagen, S, A. (2009). Understanding And Using English Grammar . America: Libray of Congress Cataloging In Publication Data.

Gaya MLA

Azar, Betty, S.., Hagen, Stacy, A.. "Understanding And Using English Grammar". America: Libray of Congress Cataloging In Publication Data, 2009. Text.