by Drs. Ibnu Syamsi, S.U $9.00
by Dr. Sjarkawi, M.Pd $7.00
by Syam Hardy $7.00
by Prof. Ir. Zoer'ani Djamal Irwan, M.Sc $7.00
by Dr. R. Paryana Suryadipura $12.00
by Drs. Husni Rahiem (Ed.) $7.00