Lotus, 1984
Buku Teks SO
[Publisher not identified], [Date of publication not identified]
Buku Teks SO
Baras, Edward M.
Osborne McGraw-Hill , 1985
Buku Teks SO
edited by Thomas van Raalte
O`Reilly, 1990
Buku Teks SO
Hughes, Patricia
Kent Publishing, 1985
Buku Teks SO