by Prof. Drs. S. Pamudji, M.P.A $9.00
by Hanafiah, A.M & A.M. Saefuddin $6.00
by drh. N. Tarigan, MSc $6.00
by K. Usman $6.00
by Dr. Zakiah Daradjat, dkk $11.00
by Ir. H. Rahmat Rukmana $5.00