by Perserikatan Bangsa-Bangsa $7.00
by Dr. Ahmad Jayadi, M.Pd $7.00
by Lismidar, H. $5.00
by Drs. Mardalis $6.00
by Ravianto $6.00
by Drs. Abdullah Ali, Drs. Misbandono, dan Ir. Eny Rahma $7.00