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

by Fauzan Muttaqien
$7.00

by Rahmadi Usman, S. H.
$16.00

by J.G. Starke. Q.C
$12.00

by Prof. Dr. F.G. Winarno
$7.00

by John D. Martin
$9.00