Cite

[Smallpox vaccine-- vaccination can prevent smallpox.] [graphic]

MLA

[Smallpox Vaccine-- Vaccination Can Prevent Smallpox.] [Graphic]. Department of Education, 0AD. https://collections.library.yale.edu/catalog/16047385.

APA, 6th edition

[Smallpox vaccine-- vaccination can prevent smallpox.] [graphic]. (0 C.E.). [Posters, Lithographs]. Department of Education. https://collections.library.yale.edu/catalog/16047385.