Hook, Sidney, author
Beacon Press, 1943
Buku Teks
Kalpokas, Ignas, author
Routledge, Taylor & Francis Group, 2018
Buku Teks
Marshall D. McCue, editor
[Springer, ], 2012
eBooks
United Nations, 1992
Buku Teks
Hutauruk, Raisa Desra Kristina, author
Universitas Indonesia, 2014
UI - Skripsi (Membership)