by Sardiman AM $9.00
by Dr. Paul Suparno, SJ. Dkk $6.00
by Prof. DR. Made Pidarta $9.00
by Prof. Dr. S. Nasution, M.A. $9.00
by Dr. C. Asri Budiningsih $7.00
by Prof. Dr. Sudarwan Danim $9.00