by Sei H. Dt. Tombak Alam $6.00
by Walker, Edward L $6.00
by Susmayati, B.A., dkk $6.00
by Drs. Daryanto $7.00
by Drs. H. Burhanuddin Salam, M.M $9.00
by DR. Iskandar Wiryokusumo $7.00