Weiss, Steve Mark, author
American Management Association, 2008
eBooks
Megginson, William L, Mary Jane Byrd, Charles R. Scott, Leon C. Megginson
Irwin, 1997
Buku Referensi
Jacobson, Ivar, author
Addison-Wesley Longman, 1997
Buku Teks
Hawkins, Barrie, author
Piatkus, 1993
Buku Teks
Dunckel, Jacqueline, author
Arcan, 1995
Buku Teks