Prasertsin, Ujsara, and Dulaya Chitayasothorn Chitayasothorn. 2014. “The Development of Indicators of Prosocial Behavior by Confirmatory Factor Analysis”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences 34 (3):42-53. https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/189631.