เสมอใจ ฉ. Proactive Service. Journal of Humanities and Social Sciences, Rajapruk University, [S. l.], v. 1, n. 2, p. 13–24, 2015. Disponível em: https://so03.tci-thaijo.org/index.php/rpu/article/view/112336. Acesso em: 19 may. 2024.