Nibras Nada Nailufar, author
2016
UI - Makalah dan Kertas Kerja
Simorangkir, J.C.T., author
Binacipta, 1980
Buku Teks
Department Of social Affairs, 1950
Buku Teks
E. J. Ardaneshwari, author
Program Pascasarjana Universitas Indonesia, 1997
UI - Tesis (Membership)
Tarigan, Paskalis Lesmana Napoleon, author
Universitas Indonesia, 2012
UI - Tesis (Open)