Aamodt, Michael G., author
Wadsworth/Cengage Learning, 2013
Buku Teks
Quinn, Virginia Nichols, author
McGraw-Hill, 1995
Buku Teks
Feldman, Robert S., author
McGraw-Hill, 1989
Buku Teks
edited by Peter Warr
Panguin Books, 1978
Buku Teks
DuBrin, Andrew J., author
Prentice-Hall, 2000
Buku Teks