Willener, Alfred
Pantheon Books, 1970
Buku Teks
Ellul, Jacques
Vintage Books, 1954
Buku Teks
Drucker, Peter Ferdinand, 1909-2005
Heinemann Profesional , 1990
Buku Teks
Drucker, Peter Ferdinand, 1909-2005
Harper & Brothers, 1959
Buku Teks
Inkeles, Alex
Harvard University Press, 1974
Buku Teks