Manugan, A. J., A. Rantetampang, and B. Sandjadja. “The Risk Factor”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 30, no. 5, Dec. 2016, pp. 280-94, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6708.