by Dr. Hamzah B. Uno, M.Pd $0.00
by Seno Gumira Ajidarma $7.00
by Prof. Dr. Oemar Hamalik $9.00
by Muhibin Syah $11.00
by B.J. Marwoto & H. Witdarmono $13.00
by Sartono Kartodirdjo $12.00