This author has not been identified. Look up 'Heru C. Rustamaji' in GoogleThis author has not been identified. Look up 'Yustina S. Suharini' in GoogleThis author has not been identified. Look up 'Angga A. Permana' in GoogleThis author has not been identified. Look up 'Wisnu Ananta Kusuma' in GoogleThis author has not been identified. Look up 'Sri Nurdiati' in GoogleThis author has not been identified. Look up 'Irmanida Batubara' in GoogleThis author has not been identified. Look up 'Taufik Djatna' in Google