[Letter] 1963 May 10, Washington, DC [to] Francis E. Walter, Washington, DC / Curtis LeMay.

Chicago citation style
LeMay, Curtis E. [Letter] 1963 May 10, Washington, DC [to] Francis E. Walter, Washington, DC / Curtis LeMay.. 1963-05-10. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/757. (Accessed December 19, 2018.)
APA citation style
LeMay, Curtis E, (1963-05-10) [Letter] 1963 May 10, Washington, DC [to] Francis E. Walter, Washington, DC / Curtis LeMay.. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/757
MLA citation style
LeMay, Curtis E. Retrieved from the Digital Public Library of America <http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/757>.
Note: These citations are programmatically generated and may be incomplete.