Harbelubun, J.F.X.
Universitas Indonesia, 1998
UI - Tesis Membership
Ismail
Universitas Indonesia, 2014
UI - Skripsi Membership
Adler, Mortimer Jerome, 1902-2001
Holt, Rinehart and Winston, 1967
Buku Teks
Artikel Jurnal
Weij, P.A. van der
Kanisius, 2000
Buku Teks