.Sikich, G. W. (1996). Emergency management planning handbook. McGraw-Hill.
Dyfyniad Arddull Chicago.Sikich, Geary W. Emergency Management Planning Handbook. New York: McGraw-Hill, 1996.
Dyfyniad MLA.Sikich, Geary W. Emergency Management Planning Handbook. McGraw-Hill, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.