by Dr. Sjarkawi, M.Pd $7.00
by Drs. H. Lili M. Sadeli, M.Pd & Drs. Maman Ukas $6.00
by Dr. Mohammad Muslehuddin $7.00
by Drs. Suyadi Prawirosentono, MBA $7.00
by Drs. Basir Barthos $9.00
by FMIPA Universitas Indonesia $6.00