MRA, letter, 1991-04-30, to Christopher

Chicago citation style
MRA. MRA, letter, 1991-04-30, to Christopher. 1991-04-30. Retrieved from the Digital Public Library of America, http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll69/id/16878. (Accessed November 21, 2018.)
APA citation style
MRA, (1991-04-30) MRA, letter, 1991-04-30, to Christopher. Retrieved from the Digital Public Library of America, http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll69/id/16878
MLA citation style
MRA. Retrieved from the Digital Public Library of America <http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll69/id/16878>.
Note: These citations are programmatically generated and may be incomplete.