Yek Ming Liew และ Hwee Ling Siek. (2022) An Ideological Multifunctional Baby Naptime Device for Safe and Eco-friendly Modern Living. <i>Rangsit Journal of Social Sciences and Humanities</i>, <i>9</i>(1), 108-123.Yek Ming Liew และ Hwee Ling Siek. "An Ideological Multifunctional Baby Naptime Device for Safe and Eco-friendly Modern Living". Rangsit Journal of Social Sciences and Humanities 9 (2022):108-123.Yek Ming Liew และ Hwee Ling Siek. An Ideological Multifunctional Baby Naptime Device for Safe and Eco-friendly Modern Living. Rangsit University:ม.ป.ท. 2022.