Gaya APA

Eckersley, C., Salisbury, C. (1978). Essential English for Foreign Students [Book 1] (Cet. 1.--). Jakarta: Dian Rakyat.

Gaya MLA

Eckersley, C.E.., Salisbury, Charles. "Essential English for Foreign Students [Book 1]". Cet. 1.-- Jakarta: Dian Rakyat, 1978. Text.