Warner, W. Lloyd
Yale University Press, 1955
Buku Teks
Warner, W. Lloyd
Yale University Press, 1941
Buku Teks SO
Linda Darmajanti
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2002
UI - Disertasi Membership
Carson, Robert C.
Longman, 1997
Buku Teks SO
John Wiley & Sons, 2004
Buku Teks SO