by Syaifuddin $12.00
by Ir. Rindit Pembayun, M.P. $6.00
by WK $18.00
by WK $13.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by DR. Farida Yusuf Tayibnapis, M.Pd $7.00
by Mikael Sugianto $11.00
by WK $16.00