Gaya APA

Harvard, J. et al (1996). GUIDE TO PROFESSIONAL & BUSINESS CORRSPONDENCE (Cet.5). Jakarta: LPPM & Pustaka Binaman Press.

Gaya MLA

Harvard, Joseph. et al. "GUIDE TO PROFESSIONAL & BUSINESS CORRSPONDENCE". Cet.5 Jakarta: LPPM & Pustaka Binaman Press, 1996. Text.