A small amount of superconducting material seems to hang in the air in a laboratory. A penny held by tweezers provides a sense of scale

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-. A small amount of superconducting material seems to hang in the air in a laboratory. A penny held by tweezers provides a sense of scale. 1989-01-10. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6435048. (Accessed July 15, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-, (1989-01-10) A small amount of superconducting material seems to hang in the air in a laboratory. A penny held by tweezers provides a sense of scale. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6435048
MLA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/6435048>.
Note: These citations are programmatically generated and may be incomplete.