Sheth, Jagdish N., author
Emerald, 2017
eBooks
Spiess, Eliot B., author
John Wiley & Sons, 1977
Buku Teks
Lewin, Benjamin
John Wiley & Sons, 1983
Buku Teks
Hartl, Daneil L., author
Jones and Bartlett, 2005
Buku Teks
Lewin, Benjamin.
Wiley,, 1983
Buku Teks