Page, Benjamin I., author
University of Chicago Press, 2006
Buku Teks
edited by Alexander T.J. Lennon
MIT Press, 2002
Buku Teks
Cuervo, Jorge, author
ATD Press, 2015
Buku Teks
Scott, Gini Graham, author
American Management Association, 2009
eBooks
Greene, Felix
Doubleday & Company, Inc., 1961
Buku Teks