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