STS050-206-012 - STS-050 - Protein Crystal Growth Experiment. Each image contains a pair of crystals.

Chicago citation style
National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973. STS050-206-012 - STS-050 - Protein Crystal Growth Experiment. Each image contains a pair of crystals.. 1981-04-12/2011-07-21. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22710235. (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) STS050-206-012 - STS-050 - Protein Crystal Growth Experiment. Each image contains a pair of crystals.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/22710235
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/22710235>.
Note: These citations are programmatically generated and may be incomplete.