Wilson, Earl R., author
McGraw-Hill, 2004
Buku Teks
Freeman, Robert J., author
Prentice-Hall, 2003
Buku Teks
Clikeman, Paul M., author
Routledge, 2009
Buku Teks
edited by J. Steven Ott and Lisa A. Dicke; with case studies by C. Kenneth Meyer
Westview Press, 2016
Buku Teks
Herwitz, David R., author
Foundation Press, 1980
Buku Teks