by Ir. H. Rahmat Rukmana $6.00
by AAK $7.00
by J. Donald Walters $3.00
by Ir. Ari Wijayani Purwanto $0.00
by Muhammad Shiddiq al-Mansyawi $6.00
by Ir. Rahmat Rukaman, MBA & Hj. Yuyun $6.00