Gaya APA

Azar, B, S. (1996). Basic english grammar / Betty Schrampfer Azar (ed.1, cet.1). : Prehallindo.

Gaya MLA

Azar, Betty, Schrampfer. "Basic english grammar / Betty Schrampfer Azar". ed.1, cet.1 : Prehallindo, 1996. Referensi.