by Henry Simamora, S.E $18.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Drs. H. Inu Kencana Syafiie $9.00
by Dr. Ahmad Jayadi, M.Pd $7.00
by Redaksi Rineka Cipta $6.00
by Drs. Rohadi Abdul Fatah $7.00