Siahaan, Joshua L., author
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Universitas Indonesia, 1999
UI - Skripsi (Membership)
Franck, Hans Goran
[publisher not identified], 2003
Buku Teks
Universitas Indonesia, 2005
UI - Skripsi (Membership)
Universitas Indonesia, 1984
UI - Skripsi (Membership)