Petersen, S. R. (1989). ZIP - the Zip-Code Insulation Program (version 1.0): Economic insulation levels for new and existing houses by three-digit ZIP code : users guide and reference manual. U.S. Dept. of Commerce, National Institute of Standards and Technology.
Chicago Style (17th ed.) CitationPetersen, Stephen R. ZIP - the Zip-Code Insulation Program (version 1.0): Economic Insulation Levels for New and Existing Houses by Three-digit ZIP Code : Users Guide and Reference Manual. Gaithersburg, MD: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.
MLA (9th ed.) CitationPetersen, Stephen R. ZIP - the Zip-Code Insulation Program (version 1.0): Economic Insulation Levels for New and Existing Houses by Three-digit ZIP Code : Users Guide and Reference Manual. U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.