Capricorn Books , 1974
Buku Teks
Nicky Maninda, author
2014
UI - Skripsi (Membership)
United Nations
United Nations, 1987
Buku Teks
Weber, Adna Ferrin, author
Cornel University Press, 1968
Buku Teks
Rahma Dian Hapsari, author
2018
UI - Tesis (Membership)