by Rivai, Harrizul $9.00
by Drs. Ibnu Syamsi, S.U $9.00
by Drs. Tgk. H.Z.A. Syihab $5.00
by Drs. Daryanto $7.00
by Ir. Respati $7.00
by Drs. A.W. Widjaja $6.00