by Ir. Mul Muyani Sutedjo $6.00
by Bur Rusuanto $12.00
by Drs. Syaiful Bahri Djamarah $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by Alex Wipperfurth $12.00
by Drs. Herman Darmawi $9.00