by Totok Jumantoro $9.00
by Prof. Subowo, dr. M.Sc., Ph.D $9.00
by A. Malik Fadjar $11.00
by Drs. Cholid Narbuko dan Drs. H. Abu Ahmadi $7.00
by Drs. Daryanto $6.00
by Prof. Dr. S. Nasution, M.A. $7.00