Blau, Peter M.
Routledge & Kegan Paul, 1963
Buku Teks
edited by Wolf V. Heydebrand
Prentice-Hall, 1973
Buku Teks
editor, Frederick G. Ruffner, Robert C. Thomas, Ann Underwood, Harold C. Young
Gale Research, 1964
Buku Referensi
Etzioni, Amitai
Free Press, 1975
Buku Teks
Douma, Sytse
Prentice-Hall, 2002
Buku Teks