Mat Yatin, Saiful Farik, Nazatul Fida Kanan, Syafiqah Kamarudin, and Zuhra Zainuddin. 2018. “Reference Sources: The Future and Implication of Reference Services in Academic Library”. International Journal of Academic Research in Progressive Education and Development 7 (3). https://ijarped.com/index.php/journal/article/view/408.