by Calvin S. Hall & Gradner Lindzey $11.00
by Dr. Hamzah B. Uno, M.Pd $9.00
by Dr. Dimyati dan Drs, Mudjiono $9.00
by Ir. Arifin Arief, M. P $5.00
by Ir. Bambang Cahyono $7.00
by $4.00
by Sururin, M.Ag $7.00
by Ir. Bambang Cahyono $6.00
by Ir. H. Rahmat Rukmana $5.00