Zaks, Rodnay, author
Sybex, 1980
Buku Teks
Fernandez, Judi N., 1941-, author
John Wiley & Sons, 1980
Buku Teks
Cortesi, David E.
Holt, Rinehart and Winston, 1982
Buku Referensi
Longkutoy, John J., author
Mutiara Sumber Widya, 1987
Buku Teks
Longkutoy, John J., author
Mutiara Sumber Widya, 1985
Buku Teks