by Dra. Nurul Zuriah, M.Si $0.00
by Dr. Hamzah B. Uno, M.Pd $0.00
by J. Robert Starratt $7.00
by A. Tresna Sastrawijaya, M.Sc $7.00
by Ir. Moehar Daniel, M.S $7.00
by Lani Sidharta $7.00
by Etzioni, Amitai $6.00
by Philip van Munching $11.00