by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by Jamilah Jones Abu Aminah Bilal Philips $6.00
by Drs. H. Malayu S.P. Hasibuan $11.00
by Thomas Armstrong, Ph.D $11.00
by Aziz Alimul $9.00
by $4.00
