by Ir. Suharto $9.00
by Drs. H. Abdul Fatah $7.00
by Dr. R. Hutapea, SKM, Ph.D $7.00
by Drs. Khaelany H.D., M.A. $9.00
by Darmono $6.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $7.00