Tavistock Publications, 1968
Buku Teks
edited by Alan Barnard, Jonathan Spencer
Routledge, 1996
Buku Referensi
Hughes, Sherick A., author
Sage, 2017
Buku Teks
Garbarino, Merwyn
Holt, Rinehart and Winston, 1977
Buku Teks
Bohannan, Paul, author
Holt, Rinehart and Winston, 1963
Buku Teks