Pankham, Sumaman, and Pornthep Plaiwech. 2022. “The Causal Factors Influencing of Purchase Decision Books on Thaibookfair Website in Bangkok and its Vicinity”. Journal of Multidisciplinary in Humanities and Social Sciences 5 (3):977-92. https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/257954.