Ward, Tara, author
Arcturus Publishing Ltd, 2008
Buku Teks
Raymond A. Levy, editor
[, Springer], 2012
eBooks
Nelson-Jones, Richard, author
Thousand Oaks, California: SAGE, 2014
Buku Teks
Shapiro, Jerrold Lee
Brooks/Cole, 1985
Buku Teks
[edited by] Ron Kraus, George Stricker, Cedric Speyer
Elsevier , 2010
Buku Teks