Hughes, Fredrick W., author
Prentice-Hall, 1983
Buku Referensi
Metcalf, Richard W., author
Harcourt Brace Jovanovich, 1990
Buku Teks
Lobo, V.M.M.
Elsevier, 1989
Buku Referensi
Little, Brown & Co., 1979
Buku Teks
Triebel, Walter A., author
Prentice-Hall, 1982
Buku Referensi