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
Gregory, Robert Henry, author
Wadsworth, 1960
Buku Teks
Inmon, W.H., author
Prentice-Hall, 1983
Buku Teks