United Nations Educational, Scientific and Cultural Organization, 1977
Buku Teks
Wiliana
Fakultas Psikologi Universitas Indonesia, 2018
UI - Skripsi (Membership)
Sari Komala Dewi
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2011
UI - Tesis (Open)
Routledge, 2020
eBooks
edited by Reinhard Bendix and Seymour Martin Lipset
Free Press, 1966
Buku Teks