Universitas Indonesia, 1993
UI - Skripsi (Membership)
Ordeshook, Peter C.
Routledge, 1992
Buku Teks
Duncan, Otis Dudley
The Free Press of Glencoe, 1961
Buku Teks
Rappaz, Michel
Springer-Verlag, 2003
Buku Teks
Tubagus Dhafin Rukmanda
2017
UI - Skripsi (Membership)