วงศ์ศิริเมธีกุลพิระวัตร์, and ณรงค์ศักดิ์สกุลสุรางค์. 2018. “Morale at Work of the Police Officers, Metropolitan Police Division 6: Morale at Work of the Police Officers, Metropolitan Police Division 6”. INTEGRATED SOCIAL SCIENCE JOURNAL, FACULTY OF SOCIAL SCIENCES AND HUMANITIES, MAHIDOL UNIVERSITY 1 (2), 39-56. https://so02.tci-thaijo.org/index.php/isshmu/article/view/145964.