by Drs. Hari Amanto & Drs. Daryanto $7.00
by Prof. Moeljatno, S.H $6.00
by Dr. Sofyan Syafri Harahap, M.S,Ac $11.00
by Dr. Ibrahim Bafadal, M.Pd $6.00
by Freddy Rangkuti $11.00
by - $9.00