by Dr. Muhammad Farmawi $5.00
by Dr. Hery Winarsi, M.S $11.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Ir. Sudadi Martodireso & Ir. Widada Agus Suryanto, MM $6.00
by Ir. Heinz Frick $7.00
by Khalid bin Abdurrahman asy-Syayi $6.00