Boy Oloan Pintu Batu, author
2015
UI - Skripsi (Membership)
Achmad Subki, author
Universitas Indonesia, 2007
UI - Tesis (Membership)
Jahne, Johannes, author
Leipzig, 1964
Buku Teks
Gultom, Bernhard F. M., author
1997
UI - Skripsi (Membership)
Sirait, Jinto, author
Fakultas Teknik Universitas Indonesia, 2005
UI - Tesis (Membership)