by Ir. Adiwarman Karim, SE, MBA, MAEP $7.00
by Dr. H. Pidyarto Gunawan, O.Carm $4.00
by Dr. Yusuf al-Qaradhawi $5.00
by Dr. Ir. M\'Imadduddin Abdul Rahim, M.Sc $6.00
by Peter Kuintenbrouwer $7.00
by N. Edy Soetanto, BE. $5.00