by Ir. Hieronymus Budi Santoso $5.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $7.00
by H. Sahilun A. Nashir $5.00
by Hasan Muhammad Ayub $6.00
by John Gottman, Ph.D. $9.00
by Drs. H. Ahmad Yani $13.00