Dyfyniad APA

Barnes, R. (1952). Motion and time study (3rd ed.). New York: Wiley.

Dyfyniad Arddull Chicago

Barnes, R.M. Motion and Time Study. 3rd ed. New York: Wiley, 1952.

Dyfyniad MLA

Barnes, R.M. Motion and Time Study. 3rd ed. New York: Wiley, 1952.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.