APA (7th ed.) Citation

United States. National Aeronautics and Space Administration. (1999). Clean water-- where does it come from?: Water purification for the International Space Station. National Aeronautics and Space Administration.

Chicago Style (17th ed.) Citation

United States. National Aeronautics and Space Administration. Clean Water-- Where Does It Come from?: Water Purification for the International Space Station. [Washington, D.C.]: National Aeronautics and Space Administration, 1999.

MLA (9th ed.) Citation

United States. National Aeronautics and Space Administration. Clean Water-- Where Does It Come from?: Water Purification for the International Space Station. National Aeronautics and Space Administration, 1999.