Siagian, Raida, author
Universitas Indonesia, 2005
UI - Skripsi (Membership)
Universitas Indonesia, 2010
UI - Skripsi (Open)
Margaret, author
Universitas Indonesia, 2008
UI - Skripsi (Open)
Universitas Indonesia, 2005
UI - Skripsi (Membership)
Tambun, Bernoulli S.P., author
Universitas Indonesia, 2010
UI - Skripsi (Open)