Nisbet, Robert A.
Oxford University Press, 1962
Buku Teks
Tarcher, Martin
Harper & Row, 1966
Buku Teks
Bacon, Terry R., 1947-
[American Management Association;, ], 2011
eBooks
Blanchard, Wendell
Buku Teks
White, Lynn T., author
World Scientific, 2009
Buku Teks