by Dr. Sofyan Syafri Harahap, M.S,Ac
$12.00

by Don W.S., Threes Emir, dan Cherry H
$13.00

by Ir. Mul Muyani Sutedjo
$7.00

by Drs. Abd. Aziz Ahmad, M.Pd
$7.00

by Soekartawi
$5.00

by Wiranda dan G. Piliang Soewondo Djojosoebagio
$7.00