by Jansen Silalahi $7.00
by Dra. Wiwi Isnaeni, M.S $11.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by N. Driyarkara, SJ (+) $40.00
by Ir. Rahmat Rukmana $5.00
by St. Darmawijaya, Pr $3.00