Smith, Frank C., author
Richard D. Irwin, 1960
Buku Teks
Berenson, Mark L., author
Prentice-Hall, 1993
Buku Teks
Anderson, David R., author
West Publishing, 1981
Buku Teks
Daniel, Wayne W., author
Houghton Miffiln, 1989
Buku Teks
Anderson, David Ray, 1941-, author
Thomson South-Western, 2008
Multimedia