by Drs. Zulkifli Amzah, Msc $13.00
by Steven D. Levitt & Stephen J. Dubner $11.00
by Juniver Girsang $9.00
by Prof. Dr. Sudarwan Danim $9.00
by Prof. Dr. J. Winardi, SE $11.00
by Ken McElroy $9.00