Long, Larry E., author
Reston Publishing, 1979
Buku Teks
Brooks, Frederick P. Jr., author
John Wiley & Sons, 1969
Buku Teks
Slotnick, Daniel L., author
D.C. Health, 1986
Buku Teks
Couger, J. Daniel, author
John Wiley & Sons, 1984
Buku Teks
Clark, Frank J., author
Prentice-Hall, 1972
Buku Teks