Gaya APA

Devito, J, A. (2011). The Elemential Elements of Public Speaking /: Joseph A. Devito (ed. 3). USA: Cram101,Inc..

Gaya MLA

Devito, Joseph, A.. "The Elemential Elements of Public Speaking /: Joseph A. Devito". ed. 3 USA: Cram101,Inc., 2011. Buku.