by Drs. H. Burhanuddin Salam, M.M $7.00
by Fachruddin H.S $18.00
by Pandji Anoraga, S.E., M.M $13.00
by Prof. DR. Taliziduhu Ndraha $7.00
by Sagimun MD $7.00
by Wahyu Wibowo $9.00