Gaya APA

SUKUR, S, G. (2008). COMPLETE ENGLISH GRAMMAR FOR THE TOEFL TEST (CET.4). : INDONESIA CERDAS.

Gaya MLA

SUKUR, SILVESTER, GORIDUS. "COMPLETE ENGLISH GRAMMAR FOR THE TOEFL TEST". CET.4 : INDONESIA CERDAS, 2008. Text.