by Ir. Moehar Daniel, M.S $7.00
by Drs. Hg. Suseno Triyanto Widodo $6.00
by Drs. Zulkifli Amzah, Msc $13.00
by Jakob Oetama $13.00
by Imam Al-Ghazali, Terj. Drs. H.A. Mustofa $9.00
by Clive Gray, Payaman Simanjuntak, dkk $12.00