Akin, John S., author
World Bank, 1987
Buku Teks
Wibbels, Erik, author
Cambridge University Press, 2005
Buku Teks
Downing, R.I.
Melbourne University Press , 1964
Buku Teks
Nash, Manning
Westview Press, 1984
Buku Teks
Ida Komala, author
2018
UI - Tesis (Membership)
Lepi T. (Tanadjaja) Tarmidi, author
[publiser not identified], [date of publication not identified]
Artikel Jurnal