Smallpox

Chicago citation style
Smallpox. 1920. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102159587. (Accessed December 16, 2018.)
APA citation style
(1920) Smallpox. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102159587
MLA citation style
Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/102159587>.
Note: These citations are programmatically generated and may be incomplete.