by Redaksi Rineka Cipta $7.00
by Syamsir Abduh $9.00
by Drs. Harjanto $9.00
by Prof. Soetjipto dan Drs. Raflis Kosasi, M.Sc $9.00
by Raldi Artono $18.00
by Collin Mclver $9.00
by Pandji Anoraga, S.E., M.M $13.00
by Erich Hill $7.00