by E. Fernando M. Manullang $9.00
by Ir. Pracaya $6.00
by Ali Masjono Mukhtar, S.E., M.Bit $7.00
by Marry Winata $6.00
by Dellmann, H. Dieter $7.00
by Prof. Soetjipto dan Drs. Raflis Kosasi, M.Sc $9.00