by Drs. G. Kartasapoetra, dkk $7.00
by $11.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Karim Al Hayali $6.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $7.00
by Robert T. Kiyosaki $12.00