Artikel Jurnal
Krow, Harvey A.
Random House , 1969
Buku Teks
Lipsky, Michael
Russel Sage Foundation, 1980
Buku Teks
Tan, Sooi Beng
Institute of Southeast Asian Studies, 1984
Buku Teks
M. Nur Abdul Gafur, author
Fakultas Teknik Universitas Indonesia, 2005
UI - Skripsi (Membership)