by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by Syaifuddin $12.00
by Muzaham, Fauzi $7.00
by Trijoto $8.00
by C. Rollin Niswonger $13.00
by Prof. Dr. J.E. Sahetapy, S.H. $3.00
by Drs. Marcel Go, M.S $7.00