by Bruce Herrick dan Charles P. Kindleberger $12.00
by Drs. H. Hartomo dan Dra. Amicun Azis $11.00
by Prof. Dr. Ahmad Shalaby $12.00
by Drs. Ahmad Rohani., H.M., M.Pd $6.00
by Prof. Dr. Suharsimi Arikunto, dkk $7.00
by Drs. H. Moh. Pabundu Tika, M.M $7.00