Tuan, Nguyen, and Vo Huy. “THE NATURE AND RELATIONSHIPS AMONG CATEGORIES OF INFORMATION IN INFORMATION SYSTEMS”. Science and Technology Development Journal 10, no. 8 (August 31, 2007): 51-59. Accessed May 19, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/2813.