by AAK $6.00
by Ir. Sri Umiyati Sumeru & Dra. Suzy Anna $6.00
by Prof. Dr. Sri Mulyani E. S $12.00
by Ir. Ari Wijayani Purwanto $11.00
by D. Soetrisno, S.H $9.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00