Gaya APA

Harahap, S, S., Jefkins, F. (2002,2007). Public Relations (Ed. 4,Ed. 5). Jakarta: Erlangga.

Gaya MLA

Harahap, Sofyan, Syafri., Jefkins, Frank. "Public Relations". Ed. 4,Ed. 5 Jakarta: Erlangga, 2002,2007. Text.