Fisher, Ernest McKinley, author
Macmillan, 1923
Buku Teks
Jaffe, Austin J., author
Prentice-Hall, 1982
Buku Teks
Wendt, Paul Francis, author
McGraw-Hill, 1979
Buku Teks
Tobias Just, Wolfgang Maennig, editors
[Springer, ], 2012
eBooks
Remley, Jim, author
American Management Association, 2007
eBooks