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