Gaya APA

SUKUR, S, G. (2004). Contextual Tenses For Effective English Communacation (1). Jakarta: Buana Ilmu Populer.

Gaya MLA

SUKUR, SILVESTER, GORIDUS. "Contextual Tenses For Effective English Communacation". 1 Jakarta: Buana Ilmu Populer, 2004. Text.