(1990). Chemical emergency preparedness and prevention technical assistance bulletin: New York, New York : El Paso County, Colorado : Alexandria, Virginia : State of Maine.
Cita Chicago (17th ed.)Chemical Emergency Preparedness and Prevention Technical Assistance Bulletin: New York, New York : El Paso County, Colorado : Alexandria, Virginia : State of Maine. 1990.
Cita MLA (9th ed.)Chemical Emergency Preparedness and Prevention Technical Assistance Bulletin: New York, New York : El Paso County, Colorado : Alexandria, Virginia : State of Maine. 1990.
Atenció: Aquestes cites poden no estar 100% correctes.