Silalahi, Togos, author
Universitas Indonesia, 1997
UI - Skripsi (Membership)
Lina Setiawati, author
Universitas Indonesia, 2014
UI - Skripsi (Membership)
Endrika Andini, author
2007
UI - Tugas Akhir
Reid, Robert C., author
Gramedia, 1977
Buku Teks
Achmad Yani, author
1992
UI - Skripsi (Membership)