ROONAPAI, R.; DISYABUTRA, L. The Role of 4-H Volunteer Leader in the Eastern Region. Kasetsart Journal of Social Sciences, [S. l.], v. 13, n. 2, p. 149–156, 1992. Disponível em: https://so04.tci-thaijo.org/index.php/kjss/article/view/244066. Acesso em: 16 sep. 2026.