by Emanuel Gerrit Singgih, Ph.D. $7.00
by A. Gianto, SJ. $6.00
by Ir. H. Rahmat Rukmana $5.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $6.00
by Alex Lanur, OFM $6.00
by Haryoto $5.00