by Kusnadi, dkk $6.00
by Beddy Irawan Maksudi $5.67
by Drs. A.W. Widjaja $6.00
by $7.00
by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by Kartadjoemena, H.S $9.00