by Drs. Ig. Wursanto
$7.00

by Prof. Dr. Sondang P. Siagian, M.P.A
$9.00

by Edilius, S.E dan Drs. Sudarsono, S.H., M.Si
$9.00

by Prijono Tjiptoherijanto, S.E, M.A, Ph.D
$11.00

by -
$13.00

by Masduki
$7.00