by Dr. Ismail Abdul Mutalib Al-Khatib
$5.00

by Dr. Hamzah B. Uno, M.Pd
$9.00

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

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

by Drs. Ec. Alex. S. Nitisemito dan Drs. M. Umar Burham. M.S
$6.00

by Paulo Freire
$7.00