Sage, 1981
Buku Teks
Schmidhauser, John R.
Little,Brown and Company, 1979
Buku Teks
Jenkins, Jeffrey A. , author
Jones and Bartlett Publishers LLC , 2011
Buku Teks
Klein, Mitchell S.G., author
Prentice-Hall, 1984
Buku Teks
Holten, N. Gary, author
McGraw-Hill, 1991
Buku Teks