by $7.00
by Dr. Ibrahim Bafadal, M.Pd $6.00
by Drs. Daryanto $11.00
by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by George R. Terry $9.00
by M. Bukhori $6.00