by Ir. Arifin Arief, M. P $5.00
by N. Wahyu Sulistiyana $4.00
by Ir. Heinz Frick $6.00
by J. Darminta, SJ $3.00
by Muhammad Chirzin $5.00
by $11.00
by $12.00
by Prof. Dr. dr. H. Dadang Hawari, Psikiater $6.00