by Prof. DR. Taliziduhu Ndraha $12.00
by Drs. Wasty Soemanto, M.Pd $6.00
by Irawan Soejito $6.00
by Prof. Dr. Moh. Mahfud MD, S.H., S.U. $9.00
by Herbert G. Hick dan G. Ray Gullet $20.00
by - $9.00