by Raymons Aron
$6.00

by Drs. Amin Widjaja Tunggal, Ak., M.B.A
$7.00

by Prof. Dr. Sondang P. Siagian, M.P.A
$11.00

by Koolma, A.
$7.00

by Ir. Irianto Aritonang
$6.00

by Deshi Ramadhani, SJ
$9.00