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