Varberg, Dale E., author
Prentice-Hall, 1991
Buku Teks
Hoffmann, Laurence D., author
McGraw-Hill, 1993
Buku Teks
Coughlin, Raymond F.
Allyn and Bacon, 1978
Buku Teks
Bers, Lipman
Holt, Rinehart and Winston, Inc., 1969
Buku Teks
Moise, Edwin E.
Addison-Wesley, 1972
Buku Teks