proposed by Centre for Research of Human Resources and the Environment
University of Indonesia, 1990
Buku Teks
Fachruddin, researcher
Departemen Pendidikan dan Kebudayaan, 1998
Buku Teks
Yarissetou, Wiklif, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2003
UI - Tesis (Membership)
Moran, Emilio F, author
John Wiley & Sons, Incorporated, 2017
Buku Teks
Desy Safitri, author
2007
UI - Disertasi (Membership)