by Yudhis M.Burhanuddin $10.00
by Sofield Juliano Hammett $9.00
by Fahri Asiza, dkk. $7.00
by Dr. Ir. M. Imadduddin Abdul Rahim, M.Sc $7.00
by Ir. Abbas Siregar Djarijah $5.00
by Abdul Halim Abu Syuqqah $11.00
by Muhlis Suhaeri $6.00
by Ir. H. Rahmat Rukman, MBA $6.00