Gaya APA

Ong, M, F. et al (1995). A Communication Langguage Course for Intermediate Student: Crosscurrents Student Book 1 . England: Pearson Education Ltd..

Gaya MLA

Ong, Marcie, Fisk. et al. "A Communication Langguage Course for Intermediate Student: Crosscurrents Student Book 1". England: Pearson Education Ltd., 1995. Text.