Sheth, Jagdish N., author
Ohio South-Western Pub, 1989
Buku Teks
McGraw-Hill, 2012
Buku Teks
edited by Mary Feeney
Bowker Sour Limited, 1994
Buku Teks
Honomichl, Jack J., author
Elex Media Komputindo , 1991
Buku Teks
Ingrid Volkmer, editor
[Wiley-Blackwell, ], 2012
eBooks