by Prof. Dr. Suharsimi Arikunto $6.00
by Dra. Nur'aeni, M.A $7.00
by Drs. H. Kahar Masyhur $11.00
by Hartono Budi, SJ. $6.00
by Fadha'il Amal $6.00
by Drs. Hartono $11.00