Litwack, Leon, author
Prentice-Hall, 1962
Buku Teks
Jane Hutchison, Andrew Brown
Routledge, 2001.
Buku Teks
Jürgen R. Grote and Claudius Wagemann, editors
Routledge, Taylor & Francis Group, 2019
Buku Teks
Usep Saepul Ahyar, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
UI - Tesis (Membership)
Neufeld, Meurice F.
Cornel University , 1961
Buku Teks