by Drs. H. Kahar Masyhur $9.00
by Prof. Drs. Piet A. Sahertian $7.00
by Robert T. Kiyosaki & Sharon L. Lechter $11.00
by Liberty Pandiangan, S.E $13.00
by Elmi, Bachrul $7.00
by MarkPlus & Co $28.00
by Ir. Kaslan A. Tohir $12.00