Etzioni, Amitai, author
Prentice-Hall, 1964
Buku Teks
Haimann, Theo, author
Houghton Mifflin, 1974
Buku Teks
Galloway, Lee, author
Alexander Hamilton Institute, 1914
Buku Teks
Bennis, Warren G., author
Addison-Wesley, [Date of publication not identified]
Buku Teks
Brown, Wilfred, author
Heinemann, 1971
Buku Teks