by Prof. H.M. Arifin, M.Ed $9.00
by Drs. Robinson Tarigan $9.00
by Drs. I Nyoman Beratha $7.00
by James R. Evans $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by Mawlana Abul A'la Mawdudi $6.00