by $6.00
by Drs. Suwarno $7.00
by Lipschutz $12.00
by Ganijanti $16.00
by Ir. M. Lies Suprapti $7.00
by WK $11.00
by Hugh Miall, Oliver Ramsbotham $11.00
by Chapra, Steven C. dan P. Canale Raymond $11.00
by Thomas Wiyasa $0.00
by Ny. Eny Rahmaningsih $7.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00
by Brian Bolt $5.00