by Sufi S.Y. $9.00
by Aprilia Fadjar Pertiwi & Arif Liasta Ginting $7.00
by Ambarini $7.00
by Ir. Hieronymus Budi Santoso $5.00
by APPMI $11.00
by Jan Hendrik Rapar $6.00
by Baum, Warren C & Stokes M. Tolbert $7.00
by Abdul Munir Mulkhan $7.00