1. Clean Air Act Amendments of 1970, Public Law 91-604, December 31, 1970. https://www.epa.gov/environmental-topics/air-topics/Clean Air Act. The most current version: https://www.epa.gov/laws-regulations/summary-clean-air-act
2. Environmental and Health & Safety Management: A Guide to Compliance;Cheremisinoff,1995
3. Summary of the Pollution Prevention Act 42 U.S.C. §13101 et seq. (1990). https://www.epa.gov/laws-regulations/summary-pollution-prevention-act
4. U.S. Environmental Protection Agency, 33/50 Program: The Final Record, EPA-745/R-99-004, Office of Pollution Prevention and Toxics, Washington, DC, 1999. https://archive.epa.gov/oppt/3350/web/pdf/3350-fnl.pdf
5. Code of Federal Regulations, 40: Chapter 1, Subchapter C, Part 51, Subpart F, 51100. EXIT accessed 8 February 2009.