Gaya APA

S.Azar, B., A.Hagen, S. (2014). Basic English Grammar (Edisi Keempat). United States of America: Pearson.

Gaya MLA

S.Azar, Betty., A.Hagen, Stacy. "Basic English Grammar". Edisi Keempat United States of America: Pearson, 2014. Text.