by Anthony F. Chiffolo
$4.00

by Ir. H. Rahmat Rukmana, MBA., MSc.
$6.00

by Drs. FXS. Purwaharsanto, LIC. I. C.
$4.00

by Ir. Bambang Cahyono
$7.00

by Eddy Kristiyanto, OFM
$7.00

by Dra. Wiwi Isnaeni, M.S
$11.00