Intaranongpai, S., Kanedtapilux, J., Chatsupakul, J. and Sunipa Motum 2025. Motivational Factors for Disease Prevention Influencing the COVID - 19 Vaccine Booster Dose Acceptance Services among Elderly Patients with Chronic Diseases Living in the Northeastern Region of Thailand. Princess of Naradhiwas University Journal. 17, 3 (Sep. 2025), 203–219.