1. Appraisal Institute.The Appraisal of Real Estate. Thirteenth edition. Chicago, IL: Appraisal Institute, 2008.
2. Appraisal Institute.The Dictionary of Real Estate Appraisal, Fifth edition. Chicago, IL: Appraisal Institute, 2008.
3. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE).Ventilation for Acceptable Indoor Air Quality. Atlanta, GA. 2010.