STS068-234-021 - STS-068 - Earth observations during STS-68 mission

Chicago citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973. STS068-234-021 - STS-068 - Earth observations during STS-68 mission. 1981-04-12/2011-07-21. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22898830. (Accessed December 11, 2018.)
APA citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973, (1981-04-12/2011-07-21) STS068-234-021 - STS-068 - Earth observations during STS-68 mission. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22898830
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/22898830>.
Note: These citations are programmatically generated and may be incomplete.