Forsyth, Donelson R., author
Wadsworth and Cengage Learning, 2014
Buku Teks
Hartley, Peter, 1946-, author
Routledge, 1997
Buku Teks
Homans, George Caspar, 1910-1989, author
Harcourt, Brace, 1950
Buku Teks
edited by William F. Bluhm, Daniel D. Skwire, Stephen J. Kaczmarek and Kristi M. Bohn
ACTEX Publications, 2012
Buku Teks
Luft, Joseph, author
National Press Books, 1970
Buku Teks