Katz, Sidney H.. A Carbon Monoxide Recorder and Alarm. [Washington D.C.]. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc66402/. Accessed May 21, 2013.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.