Bernays, Edward L.
University of Oklahoma Press, 1952
Buku Teks
Cutlip, Scott M.
Indeks, 2005
Buku Teks
Dilenschneider, Robert L.
American Management Association, 2010
eBooks
Yosal Iriantara
Simbiosa Rekatama Media, 2005
Buku Teks
Zollo, Burt
McGraw-Hill Book, 1967
Buku Teks