Heck, Harold J.
American Management Association, 1972
Buku Teks
Stephen Young [and others]
Prentice-Hall, [date of publication not identified]
Buku Teks
Cateora, Philip R., author
McGraw-Hill, 1999
Buku Teks
Cateora, Philip R., author
Richard D. Irwin, 1996
Buku Teks
Cateora, Philip R., author
Richard D. Irwin, 1993
Buku Teks