Barnes, R. M. (1968). Motion and time study: Design and measurement of work (6th edition.). Wiley.
Chicago-referens (17:e uppl.)Barnes, Ralph Mosser. Motion and Time Study: Design and Measurement of Work. 6th edition. New York: Wiley, 1968.
MLA-referens (9:e uppl.)Barnes, Ralph Mosser. Motion and Time Study: Design and Measurement of Work. 6th edition. Wiley, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.