by $4.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by Prof. drh. Charles Rangga Tabbu, M.Sc., Ph.D $13.00
by Dr. C. Groenen, OFM. $12.00
by Dr. Ir. Muhammad Rasyaf, MS $11.00
by Myria, OSF. $4.00