Bradly, Frank
Prentice-Hall, 1995
Buku Teks
Heck, Harold J.
American Management Association, 1972
Buku Teks
Dahringer, Lee D., author
Addison-Wesley, 1991
Buku Teks
Wiklund, Erik, author
McGraw-Hill , 1987
Buku Teks
Terpstra, Vern
The Dryden Press , 1991
Buku Teks