S49-28-020 - STS-049 - Unidentified Earth observation scenes.

Chicago citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973. S49-28-020 - STS-049 - Unidentified Earth observation scenes.. 1981-04-12/2011-07-21. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22703123. (Accessed October 23, 2018.)
APA citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973, (1981-04-12/2011-07-21) S49-28-020 - STS-049 - Unidentified Earth observation scenes.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22703123
MLA citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/22703123>.
Note: These citations are programmatically generated and may be incomplete.