Sumichan, Andrew, 		Gede Yudiana, I Made, 		Ridwan Satrio, Muhammad, AND 		Sudarma, I Made.
" Designing a Virtual Data Warehouse in Supporting Sales Information Needs (Case Study: National Scale Building Material Store X)" <em>International Journal of Engineering and Emerging Technology</em> [Online], Volume 4 Number 1 (7 October 2019)