Lertmongkhonnam, Piriya, and Ngamlamai Piolueang. 2018. “Influences of Family Function, Social Support and Self Esteem on Virtue of the Young Volunteer-Spirits: A Case Study of Community Hospitals in Nonthaburi Province”. Journal of Health Science of Thailand 18 (2):222-29. https://thaidj.org/index.php/JHS/article/view/1674.