Baras, Edward M., author
Osborne McGraw-Hill , 1985
Buku Teks
Lotus, 1984
Buku Teks
Hughes, Patricia, author
Kent Publishing, 1985
Buku Teks
[publisher not identified], [date of publication not identified]
Buku Teks
Lotus, [date of publication not identified]
Buku Teks