Ruse, Michael, author
Cambridge University Press, 2012
Buku Teks
Jeff Malpas
Springer, 2012
eBooks
Peter Daniels [and others]
Prentice-Hall, 2001
Buku Teks
Harbison, Frederick Harris, author
International Institute for Educational Planning Unesco , 1967
Buku Teks
Tobing, Sorta Delima, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2005
UI - Tesis Membership