สิงห์วี เ. Attitude and Altruistic Behavior toward Older Persons of Students of Faculty of Social Sciences at Kasetsart University. swtu [internet]. 2019 Feb. 12 [cited 2025 Apr. 10];23(2):55-78. available from: https://so04.tci-thaijo.org/index.php/swjournal/article/view/171647