Adi Negoro, author
Bulan Bintang, [date of publication not identified]
Buku Teks
Niode, Max, author
Universitas Indonesia, 1998
UI - Tesis (Membership)
Valina Singka Subekti, author
Lembaga Pangkajian MPR RI, 2017
Artikel Jurnal
Purba, Oloan Sahat Torus, author
Universitas Indonesia, 2010
UI - Tugas Akhir
Agustin Wahyu Setyawati, author
Universitas Indonesia, 2010
UI - Tesis (Open)