by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk $7.00
by Miftah Thoha $7.00
by Acep Djazuli $7.00
by Steven Dowsen, dkk $12.00
by Prof. Dr. I.H. Ph. Diederiks - Verschoor $7.00
by F.X. Djumialdji, S.H $6.00