Mercury V mission - Earth Observations.

Chicago citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. Information Systems Directorate. Photographic and Digital Laboratory. 2/17/1973-2/1997. Mercury V mission - Earth Observations.. 1961-11-29. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5804437. (Accessed December 19, 2018.)
APA citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. Information Systems Directorate. Photographic and Digital Laboratory. 2/17/1973-2/1997, (1961-11-29) Mercury V mission - Earth Observations.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5804437
MLA citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. Information Systems Directorate. Photographic and Digital Laboratory. 2/17/1973-2/1997. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/5804437>.
Note: These citations are programmatically generated and may be incomplete.