by Peter H. Lindert $26.00
by Drs. Wasty Soemanto, M.Pd $6.00
by John W. Osbome $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Soekartawi, dkk $7.00
by Drs. Tgk. H.Z.A. Syihab $6.00
by Ir. Rabiatual Adawyah, M.P $7.00