by Dwi Winarno, S.Pd., M.Si $9.00
by Squire, Lyn $6.00
by Drs. Ec. Alex. S. Nitisemito dan Drs. M. Umar Burham. M.S $6.00
by - $13.00
by Baum, Warren C & Stokes M. Tolbert $9.00
by Dr. Ir. Hermawan Thaheer $11.00