วงศ์ศิริเมธีกุลพ.; ณรงค์ศักดิ์สกุลส. 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, v. 1, n. 2, p. 39-56, 17 Sep. 2018.