Kosso, Peter
Cambridge University Press, 1992
Buku Teks SO
edited by Richard Boyd, Philip Gasper, and J. D. Trout
Bradford Book, 1997
Buku Teks SO
Williams, Malcolm, 1953-
Routledge, 2000
Buku Teks SO
Mithaug, Dennis E.
Sage Publications, Inc., 2000
Buku Teks SO
Suma Riella Rusdiarti
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2004
UI - Tesis Membership