Letter from Karyl Somerton et al. to the President

Chicago citation style
President (1963-1969 : Johnson). White House Central Files. 1963-1969. Letter from Karyl Somerton et al. to the President. 1964-09-07. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6802693. (Accessed December 14, 2018.)
APA citation style
President (1963-1969 : Johnson). White House Central Files. 1963-1969, (1964-09-07) Letter from Karyl Somerton et al. to the President. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6802693
MLA citation style
President (1963-1969 : Johnson). White House Central Files. 1963-1969. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/6802693>.
Note: These citations are programmatically generated and may be incomplete.