Arnush, Craig, author
Sams Pub., 1995
Buku Teks
Traister, Robert J., author
M&T Books, 1991
Buku Teks
Stevens, Roger T.
M & T Books, 1989
Buku Teks
Mahar, Paul
Sam.net Publishing, 1997
Buku Referensi
[place of publication not identified]: [publisher not identified], [date of publication not identified]
Buku Teks