Gaya APA

Ribbens, G, W. (2007). Handling Difficult People and Difficult Situations . : CV. Spektra Anugerahabadi.

Gaya MLA

Ribbens, Gregory, Whitear,Geoff. "Handling Difficult People and Difficult Situations". : CV. Spektra Anugerahabadi, 2007. Komunikasi dan Penyiaran Islam.