by Cumhur Cil, dkk $9.00
by Wahyuni Mulyawati & Ilse Harahap $7.00
by Richard Carlson, Ph.D $11.00
by Prof. Dr. H. Abdurrahmat Fathoni, M.Si $7.00
by Anwar Hadi $9.00
by Wied Harry Apriadji $12.00