by - $13.00
by Dr. Nurjannah Ismail $11.00
by Ir. Endar Sugiarto, B.A $6.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $7.00
by Joe Girard $7.00
by Hermawan Kartajaya & Yuswohady $9.00