Edy Dawud, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1997
UI - Tesis (Membership)
Hawe, Penelope, author
Maclennan , 2000
Buku Teks
edited by Jane G. Zapka
Third Party Publishing, 1982
Buku Teks
edited by Ernest R. House
Academic Press, 1986
Buku Teks
Bohlin, Lisa, author
McGraw-Hill, 2012
Buku Referensi