by Dr. Hery Winarsi, M.S $11.00
by Prof. Mr. O.K. Brhan (diterjemahkan oleh: Linus Doludjawa) $9.00
by Lembaga Bhinneka $4.32
by Ir. H. Rahmat Rukmana, MBA., MSc. $6.00
by $11.00
by Alexandra Leirissa Yunadi $9.00
by Abdul Mani $12.00
by Ir. Pracaya $6.00
by $7.00
by - $7.00
by Syekh Muhammad bin Shalih Utsaimin $7.00
by Hilman $5.00
