by L. Ron Hubbard
$6.00

by -
$12.00

by Prof. Dr. S. Nasution, M.A.
$7.00

by Drs. Hari Sasangka, S.H., M.H.
$8.00

by Prof. Dr. Andi Hamzah, S. H.
$0.00

by Prof. Dr. Nur Nasry Noor, M.P.H
$6.00