by Ir. Hatta Sunanta, B.Sc., MS $5.00
by A. Setiyawan, SJ. $7.00
by Prof. Mr. Dr. Sudargo Gautama $7.00
by MUSA KAZHIM $8.00
by Hairus Salim HS $7.00
by Denny J. A $6.00
by KH Husein Muhammad $9.00
by Michael Sherraden $13.00
by Dr. Ir. Muhammad Rasyaf, MS $6.00
by Heru Susanto $6.00
by $5.00
