by Hermawan Kartajaya $18.00
by Drs. Syaiful Bahri Djamarah $11.00
by Michael Hammer $13.00
by Allan B. Muntjoy $9.00
by Drs. Wasty Soemanto $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00