1) Leader-Post Carrier Foundation. 1991. Environmental and Energy Household Hints. Centax Books, Regina, Canada.
2) U.S. Department of Housing and Urban Development, Public and Indian Housing, Energy Conservation Measures: M5. Install Water-Saving Toilets, http://www.hud.gov/offices/pih/programs/ph/phecc/strat_list.cfm
3) IBID
4) U.S. Department of Housing and Urban Development, Public and Indian Housing, Energy Conservation Measures: W1. Install Water-Efficient Showerheads and Faucet Aerators, http://www.hud.gov/offices/pih/programs/ph/phecc/strat_list.cfm
5) U.S. Department of Housing and Urban Development, Public and Indian Housing, Energy Conservation Measures: M5. Install Water-Saving Toilets, http://www.hud.gov/offices/pih/programs/ph/phecc/strat_list.cfm