Saragi, Tonny Horas, author
Universitas Indonesia, 1994
UI - Skripsi (Membership)
Lembaga Penelitian Universitas Indonesia, 1987
Buku Teks
Universitas Indonesia, 1994
UI - Skripsi (Membership)
Lusavia Arijanto, author
1996
UI - Tesis (Membership)
Wagner, Lola, author
Pustaka Sinar Harapan, 1997
Buku Teks