The Halloween Nor'easter of 1991 :
east coast of the United States ... Maine to Florida and Puerto Rico, October 28 to November 1, 1991.

APA Citation

United States. National Oceanic and Atmospheric Administration. (1992). The Halloween Nor'easter of 1991: east coast of the United States ... Maine to Florida and Puerto Rico, October 28 to November 1, 1991. Silver Spring, Md.: U.S Dept. of Commerce, National Oceanic and Atmospheric Administration, National Weather Service.

MLA Citation

United States. National Oceanic and Atmospheric Administration. The Halloween Nor'easter of 1991: East Coast of the United States ... Maine to Florida And Puerto Rico, October 28 to November 1, 1991. Silver Spring, Md.: U.S Dept. of Commerce, National Oceanic and Atmospheric Administration, National Weather Service, 1992.

Warning: These citations may not always be complete (especially for serials).