1. School of Computer Science, Bina Nusantara University,Computer Science Department,Jakarta,Indonesia
2. School of Computer Science, Bina Nusantara University,Mathematics Statistics Department,Jakarta,Indonesia
3. Universitas Mercu Buana,Informatics Engineering Program, Faculty of Computer Science,Jakarta,Indonesia
4. Tunku Abdul Rahman University College,Faculty of Computing and Information Technology,Computer Science Department,Kuala Lumpur,Malaysia