Katz, Sidney H.; Reynolds, D. A.; Frevert, H. W. & Bloomfield, J. J. A Carbon Monoxide Recorder and Alarm. [Washington D.C.]. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc66402/. Accessed March 29, 2015.
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.