Gaya APA

Azar, B, S., Hagen, S, A. (2016). E-Book Understanding and Using English Grammar Fifth Edition (5). : Pearson Education Ltd..

Gaya MLA

Azar, Betty, Schrampfer., Hagen, Stacy, A. "E-Book Understanding and Using English Grammar Fifth Edition". 5 : Pearson Education Ltd., 2016. E-Book.