[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah
Simbolon, F. Hilarius
Universitas Indonesia, 2013
UI - Skripsi (Membership)
Sekretariat Jendral Dewan Perwakilan Rakyat RI, 2016
Buku Referensi
Sihombing, Frans Bona
Sinar Grafika, 1990
Buku Teks