Sukaria, author
1995
UI - Skripsi (Membership)
Stein, Ben, author
Gramedia, 2006
Buku Teks
Una Amanda Priharani, author
2004
UI - Skripsi (Membership)
Yusak Novanto, author
2001
UI - Skripsi (Membership)
Siagian, Eva Grace Rouli, author
2002
UI - Skripsi (Membership)