by Prof. Dr. Ir. Tri Yuwanta S.U., DEA $7.00
by Prof. DR. Made Pidarta $11.00
by Drs. H. Zainuddin $7.00
by Prof. Dr. h. Sunarto dan Dra. Ny. B. Agung Hartono $9.00
by Ir. Suharto $9.00
by Redaksi Rineka Cipta $9.00