1. Biomarkers of environmental tobacco smoke exposure.
2. editors. 2003. Tobacco policy: Strategies, successes, and setbacks. Washington, DC: The World Bank. p 136.
3. CA EPA (California Environmental Protection Agency). 1997. Health effects of exposure to environmental tobacco smoke. Sacramento: California Environmental Protection Agency, Office of Environmental Health Hazard Assessment.
4. CA Lab. Code (State of California Labor Code). 1994. Section 6404.5(b).
5. California Assembly Bill 13 (AB 13). 1994. An act to add Section 6404.5 to the Labor Code, Relating to Occupational Safety and Health. Session.