Valenzuela, M.G., R.C. Segador, R. Oxina, M.A. Villanueva, J.K. Cabahug, and Eiza R. Adduru, MBA. 2019. “An Office Procedure Study in Human Resource Department and Billing and Collection Section in XYZ Company”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research 1 (1). https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/1867.