by Bilson Simamora $13.00
by Ashadi Siregar & I Made Suarjana $6.00
by Bambang Sunggono $9.00
by Rosady Ruslan $9.00
by Prof. Dr. Sirajuddin Zar $9.00
by Darmadi Durianto, Sugiarto, Tony Sitinjak $7.00