by Prof. Dr. Suharsimi Arikunto $18.00
by Dr. Sayidd Al-Jumaili $7.00
by Erman Rajagukguk, S.H $7.00
by Murad Lesmana, Jeanette $5.00
by DR. A. Saleh Abdullah $9.00
by Ir. AG. Kartasapoetra $9.00