by Ir. Moehar Daniel, M.S $7.00
by Wahyu Qamara Mugnisjah & Asep Setiawan $7.00
by Aziz Alimul $7.00
by Mary P. McGowen $12.00
by dr. Boyke Dian Nugraha $7.00
by Drs. Agus Sujanto, dkk $7.00