Ying, letter, 1991-05-17, to Christopher

Chicago citation style
Ying, William. Ying, letter, 1991-05-17, to Christopher. 1991-05-17. Retrieved from the Digital Public Library of America, http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll69/id/16766. (Accessed November 17, 2018.)
APA citation style
Ying, William, (1991-05-17) Ying, letter, 1991-05-17, to Christopher. Retrieved from the Digital Public Library of America, http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll69/id/16766
MLA citation style
Ying, William. Retrieved from the Digital Public Library of America <http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll69/id/16766>.
Note: These citations are programmatically generated and may be incomplete.