Borland International, 1988
Buku Referensi
editors, Richard C. Johnson, Henry Jasik
McGraw-Hill, 1987
Buku Referensi
Katz, William A., 1924-, author
Holt, Rinehart and Winston, 1979
Buku Teks
King, James J
John Wiley & Sons, 1995
Buku Referensi
King, James J., author
John Wiley & Sons, 1995
Buku Referensi