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Dyfyniad Arddull Chicago.Kaplan, Laura G. Emergency and Disaster Planning Manual. New York: McGraw-Hill, 1996.
Dyfyniad MLA.Kaplan, Laura G. Emergency and Disaster Planning Manual. McGraw-Hill, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.