Science Research Associates , 1967
Buku Teks
Diacogiannis, George
Addison-Wesley Publishing, 1991
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Garrison, Paul
TAB Books, 1982
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Barden, William Jr.
Howard W. Sams & Co., 1977
Buku Teks
Fernandez, Judi N., 1941-
John Wiley & Sons, 1981
Buku Teks