Gaya APA

Widarso, D, W., Mariani, D, L. (1994). Complete English Grammar . YOGYAKARTA: KANISIUS.

Gaya MLA

Widarso, Drs., Wishnubroto., Mariani, Dra., Lutut. "Complete English Grammar". YOGYAKARTA: KANISIUS, 1994. Text.