by Prof. dr. D. Bachtiar Lubis, dr. Sylvia D. Elvira $7.00
by Drs. Daryanto $7.00
by M. Linggar Anggoro $12.00
by J. Guwandhi, SH. $7.00
by Dr. Zakiah Daradjat, dkk $11.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00