Pitoyo
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2011
UI - Tesis (Open)
Batubara, Ery Rura P.
Program Pascasarjana Universitas Indonesia, 2005
UI - Tesis (Membership)
Latif Adam
2015
Artikel Jurnal
John Sikula, senior editor ; Thomas Buttery, editor, Edith Guyton, editor
Macmillan Library Reference USA, 1996
Buku Referensi
by Z.C. Huijsman ... [et al.]
Educational Centre University of Twente , 1991
Buku Teks