by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Yuswar Zainul Basri & Mulyadi S $9.00
by - $11.00
by Abu Bakar, dll - Zuhair Mahmud al-Hawari $9.00
by Charles C. manz, cs $11.00
by - $12.00
by Hilman Soetanto $16.00