by Ir. Adiwarman Karim, SE, MBA, MAEP $7.00
by Mahmud Abu Saud $6.00
by - $7.00
by Daniel L. Llowery, CSsR $6.00
by Prof. Dr. Ahmad Shalaby $7.00
by Drs. Aloysius Soenarto & Stanislaus Suliangto $4.00