Archenbach, Paul R.; Davis, Joseph C. & Smith, William T. Analysis of Electric Energy Usage in Air Force Houses Equipped with Air-to-Air Heat Pumps. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc13244/. Accessed July 31, 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.