by Prof. Dr. S. Nasution, M.A. $7.00
by Sotar Baduara & Drs. S. Martin Sirait $6.00
by Drs. Hari Amanto & Drs. Daryanto $7.00
by Julius R. Latumaerissa, S.E., M.M $7.00
by Dr. H. Amzah B. Uno, M.Pd $7.00
by Drs. Ibnu Syamsi, S.U $6.00
by $11.00
by Radhar Panca Dahana $7.00
by $6.00
by Dr. Yusuf al-Qaradhawi $6.00
by M. Irfan Hidayatullah $6.00
by - $5.00