American National Red Cross. (1957). American Red Cross first aid textbook (4th ed. rev.). Doubleday.
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Dyfyniad Arddull Chicago
American National Red Cross. American Red Cross First Aid Textbook. 4th ed. rev. Garden City, N.Y.: Doubleday, 1957.
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Dyfyniad MLA
American National Red Cross. American Red Cross First Aid Textbook. 4th ed. rev. Doubleday, 1957.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.