Jackman, Hilda L., author
Wadsworth and Cengage Learning, 2012
Buku Teks
Organisation for Economic Co-operation and Development, 1974
Buku Teks
Kaufman, Roger A.
Prentice-Hall, 1972
Buku Teks
Hendri Gunawan, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Tesis (Membership)
Anderson, C.A., author
Bharata Karya Aksara, 1983
Buku Teks