Dyfyniad APA

(1990). Chemical emergency preparedness and prevention technical assistance bulletin: New York, New York : El Paso County, Colorado : Alexandria, Virginia : State of Maine.

Dyfyniad Arddull Chicago

Chemical Emergency Preparedness and Prevention Technical Assistance Bulletin: New York, New York : El Paso County, Colorado : Alexandria, Virginia : State of Maine. 1990.

Dyfyniad MLA

Chemical Emergency Preparedness and Prevention Technical Assistance Bulletin: New York, New York : El Paso County, Colorado : Alexandria, Virginia : State of Maine. 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.