by Prof. Dr. Makmur, M.Si $7.00
by FMIPA Universitas Indonesia $6.00
by Prof. H.M. Arifin, M.Ed $9.00
by Drs. Tgk. H.Z.A. Syihab $5.00
by Sardiman AM $9.00
by Prof. Dr. Husaini Usman, M.Pd dan R. Purnomo Setiady Akbar, S.Pd., M.Pd $6.00