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Dyfyniad Arddull Chicagoebrary, Inc, David Blankenhorn, Barbara Dafoe Whitehead, and Sorcha Brophy-Warren. Franklin's Thrift: The Lost History of an American Virtue. West Conshohocken, Pa.: Templeton Press, 2009.
Dyfyniad MLAebrary, Inc, et al. Franklin's Thrift: The Lost History of an American Virtue. Templeton Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.