APA (7th ed.) Citation

Langley Research Center, United States. National Aeronautics and Space Administration, & Allred, J. W. (1976). An inexpensive economical solar heating system for homes. U.S. National Aeronautics and Space Administration.

Chicago Style (17th ed.) Citation

Langley Research Center, United States. National Aeronautics and Space Administration, and Johnny W. Allred. An Inexpensive Economical Solar Heating System for Homes. Washington: U.S. National Aeronautics and Space Administration, 1976.

MLA (9th ed.) Citation

Langley Research Center, et al. An Inexpensive Economical Solar Heating System for Homes. U.S. National Aeronautics and Space Administration, 1976.