by $6.00
by Zara, Yuanda $5.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00
by Ir. M. Lies Suprapti $6.00
by Syekh Abdul Qadir Ahmad Atha $6.00
by Dr. Ir. H.S. Farid Ruskanda, M.Sc. A.P.U. $5.00
by Prof. Dr. Sri Mulyani E. S $12.00