by Burhan Bungin $9.00
by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk $7.00
by Prof. Mr. Dr. Sudargo Gautama $6.00
by Joe H. Slate, Ph.D $13.00
by $13.00
by Victor M. Situmorang, S.H. dan Dra. Cormetyna Sitanggang $9.00