by $4.00
by Penerbit OBOR $5.00
by Dr. Ir. Ahmad Khalid $11.00
by K.H. Anwar Sanusi $9.00
by Thomas P. Rausch $9.00
by Bonie Payong, SS.CC $5.00
by H. Dahlan Thaib, dkk $7.00
by Bambang Sunggono $9.00