Jossey-Bass Inc., Publishers, 1990
Buku Teks
edited by Karen Hill
Gale Research, 1990
Buku Referensi
Betty Riadini, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1992
UI - Tesis Membership
Orlans, Harold, author
McGraw-Hill, 1972
Buku Teks
Dearing,James W.
Routledge, 1995
Buku Teks