NASA facts :
an educational publication of the National Aeronautics and Space Administration.
APA Citation
United States. National Aeronautics and Space Administration. NASA facts: an educational publication of the National Aeronautics and Space Administration. [Washington, D.C.?]: U.S. National Aeronautics and Space Administration.
MLA Citation
United States. National Aeronautics and Space Administration. NASA Facts: an Educational Publication of the National Aeronautics And Space Administration. [Washington, D.C.?]: U.S. National Aeronautics and Space Administration,
Warning: These citations may not always be complete (especially for serials).