by Dr. Ir. Muhammad Rasyaf, MS
$6.00

by Soerjono Soekanto
$12.00

by Dr. Mahsun, M.S
$11.00

by Sanusi, Bachrawi
$5.00

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

by Evi Hartanti, S. H.
$9.00