Noppawan Tanakanjana Phongkhieo และ Thanakrit Sangchoey. (2018) Regulation Compliance Model of National Park Visitors. <i>Humanities, Arts and Social Sciences Studies</i>, <i>18</i>(3), 695-716.Noppawan Tanakanjana Phongkhieo และ Thanakrit Sangchoey. "Regulation Compliance Model of National Park Visitors". Humanities, Arts and Social Sciences Studies 18 (2018):695-716.Noppawan Tanakanjana Phongkhieo และ Thanakrit Sangchoey. Regulation Compliance Model of National Park Visitors. Silpakorn University Research and Development Institute:ม.ป.ท. 2018.