by $18.00
by Koeswinarno $9.00
by Ivy Naistadt $11.00
by Prof. Richard Chauvel $7.00
by Gordon, Gibson G. dan Paul Skett $7.00
by Prof. DR. Taliziduhu Ndraha $11.00
by Drs. H. Kahar Masyhur $13.00
by Ny. Susmayati, B.A dan Ny. Hj. Asnidar $6.00
by Suhardo & A. Hadiwiyata $3.00
by Andrias Harefa $6.00
by Ir. Rahmat Rukaman, MBA & Hj. Yuyun $6.00
by Friza Reihan $10.84