by Dr. Franz Magnis Suseno, SJ $12.00
by Sakti A. Siregar $6.00
by Dr. Hery Winarsi, M.S $11.00
by Ir. Kaslan A. Tohir $9.00
by Lanny Lingga $9.00
by Ir. Ari Wijayani Purwanto $11.00