Artikel Jurnal
Ragin, Charles C., author
University of California Press, 1987
Buku Teks
Klecka, William R., author
Sage, 1980
Buku Teks
Universitas Indonesia, 1993
UI - Skripsi (Membership)
Mawardi Mansoer, author
Fakultas Teknik Universitas Indonesia, 1995
UI - Tesis (Membership)