by Idris Thaha (Ed.) $7.00
by Richard Denny $9.00
by Freddy Rangkuti $9.00
by Jaja Zakaria $12.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Drs. Zulkifli Amzah, Msc $13.00