by Seno Gumira Ajidarma $10.00
by Ir. Moehar Daniel, M.S $7.00
by M.T. Al-Hadadi, Terj. Drs. H. Zainuddin $7.00
by Prof. DR. Taliziduhu Ndraha $7.00
by Drs. Abdul Chaer $11.00
by Asnath M. Fuah. Dkk $8.65