Gary L. Lilien, editor
Edward Elgar, 2012
Buku Teks
Walthall, Wylie A., author
Harper and Row, 1987
Buku Teks
Hanke, John E., author
Pearson - Prentice Hall, 2009
Buku Teks
Nickels, William G., author
McGraw-Hill, 2008
Buku Teks
Krizan, A. C. (Buddy), author
Thomson, 2008
Buku Teks