Dyfyniad APA
(1979). Introduction to work study (3rd ed.). International labour office.
Dyfyniad Arddull Chicago
Introduction to Work Study. 3rd ed. Geneva: International labour office, 1979.
Dyfyniad MLA
Introduction to Work Study. 3rd ed. International labour office, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.