by Ir. Adiwarman Karim, SE, MBA, MAEP $7.00
by F.X. Nguyen van Thuan $6.00
by H. Sahilun A. Nashir $5.00
by Prof. Dr. M. Mutawalli asy-Sya'rawi $6.00
by Majdi Assayyid Ibrahim $5.00
by Dr. Tijani Abdul Qadir Hamid $9.00