by Drs. Bambang Siswanto, M.A $6.00
by Dr. B. Siswanto Sastrohadiwiryo $9.00
by M. Firdaus $7.00
by Dr. Maryaeni, M.Pd $6.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Ir. M. Iqbal Hasan $12.00