by Drs. Ibnu Syamsi, S.U $9.00
by Drs. Daryanto $7.00
by Ratna Hidayati $6.25
by Prof. Dr. S. Nasution, M.A. $6.00
by Dr. Zakiah Daradjat, dkk $9.00
by Drs. Zainuddin, dkk $7.00