STS050-81-068 - STS-050 - STS-50 earth observations

Chicago citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973. STS050-81-068 - STS-050 - STS-50 earth observations. 1981-04-12/2011-07-21. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22718953. (Accessed September 22, 2018.)
APA citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973, (1981-04-12/2011-07-21) STS050-81-068 - STS-050 - STS-50 earth observations. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22718953
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/22718953>.
Note: These citations are programmatically generated and may be incomplete.