Farrell, William R., author
Quorum Books, 1999
Buku Teks
Halpern, Joel M., author
Prentice-Hall, 1967
Buku Teks
Largay, James A., III, author
John Wiley & Sons, 1976
Buku Teks
edited by Alton C. Bartlett, Thomas A. Kayser
Prentice-Hall, 1973
Buku Teks
Roeber, Richard J.C., author
Addison-Wesley, 1973
Buku Teks