Gaya APA

Hagen, A, B, S, A, S, A. (2007). Basic English Grammar + Compact Disc Without Answer Key . : Allyn & Bacon.

Gaya MLA

Hagen, Azar;, Betty, Schrampfer, Azar;, Stacy, A.. "Basic English Grammar + Compact Disc Without Answer Key". : Allyn & Bacon, 2007. Text.