Gaya APA

Azar, B, S., Hagen, S, A. (2012). Understanding and Using English : Fourth Edition (Ed.4 Cet 3). United State of America: Publicaton Data.

Gaya MLA

Azar, Betty, S., Hagen, Stacy, A. "Understanding and Using English : Fourth Edition". Ed.4 Cet 3 United State of America: Publicaton Data, 2012. Text.