by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Dra. Sutratinah Tirtonegoro $7.00
by Moh. Daud Ali $11.00
by Prof. Dr. Husaini Usman, M.Pd dan R. Purnomo Setiady Akbar, S.Pd., M.Pd $6.00
by Drs. Robinson Tarigan $9.00
by Mawlana Abul A'la Mawdudi $6.00