Willener, Alfred
Pantheon Books, 1970
Buku Teks
Drucker, Peter Ferdinand, 1909-2005
Harper & Brothers, 1959
Buku Teks
Inkeles, Alex
Harvard University Press, 1974
Buku Teks
Huyghe, Rene
Weatherhill, 2007
Buku Teks
Krutch, Joseph Wood
Greenwood Press, 1979
Buku Teks