Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper & Row, 1996
Buku Teks
Graham, Michael Dennis, author
American Management Association, 2008
eBooks
Henshaw, Richard C., author
Richard D. Irwin, 1966
Buku Teks
Copeland, Melvin T., author
Harvard University Press, 1955
Buku Teks
Bernard, Chester I., author
Harvard University Press , 1966
Buku Teks