by Drs. Abdullah Ali, Drs. Misbandono, dan Ir. Eny Rahma $7.00
by Fachruddin H.S $7.00
by Drs. Ary H. Gunawan $11.00
by Burhan Bungin $9.00
by Dra. Khusnul Khotimah $6.00
by AT Mahmud $13.00