London : Wise Publications, 1999,
Buku Teks
French, Richard Mark, author
[, Springer], 2012
eBooks
Day, Paul, author
Chartwell Books, 2015
Buku Referensi
McLeod, Donald
Leicester The Dryad Press , 1971
Buku Teks
Herling Parikesit, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012
UI - Tugas Akhir