Muhibuddin, Fuad Wahdan, Popong Nurhayati, and Mohamad Sahid Rahman. “USER EXPERIENCE ANALYSIS OF SMART PHONE USERS IN EXPLORING AND READING NONFICTION BOOKS”. Business Review and Case Studies 2, no. 1 (April 30, 2021): 49. Accessed November 27, 2021. https://journal.ipb.ac.id/index.php/brcs/article/view/35981.