by Achmad Tjahhono, Mahagiyani $12.00
by Gunawan Widjaja, A. Yani $7.00
by Prof. Dr. Soekartawi $7.00
by Yernelis Sukma, M.S., & Yakup $7.00
by Akhmad Taufik, M.Pd., dkk $11.00
by Ibrahim Muhammad Jamal $7.00