by Husein Umar $9.00
by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by Ahmad Akrom Fahmi $7.00
by $7.00
by Koeswinarno $9.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00