by Ir. Loekas Soesanto, M.S., Ph.D $11.00
by Dr. Thariq M.As-Suwaidan dan Ir. Faisal Umar Basyarahil $11.00
by ISEI $13.00
by Adi Gunawan $6.00
by Ir. H. Rahmat Rukman, MBA $6.00
by Amr Abdul Mun\'im Salim $5.00