Spring 1960: 2-11-5: Operation Portrex, by Edwin L. Sibert

Chicago citation style
Central Intelligence Agency. 12/4/1981. Spring 1960: 2-11-5: Operation Portrex, by Edwin L. Sibert. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/7282615. (Accessed October 23, 2018.)
APA citation style
Central Intelligence Agency. 12/4/1981, Spring 1960: 2-11-5: Operation Portrex, by Edwin L. Sibert. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/7282615
MLA citation style
Central Intelligence Agency. 12/4/1981. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/7282615>.
Note: These citations are programmatically generated and may be incomplete.