[Exterminate flies-- ways of exterminating flies]. [graphic]
MLA
[Exterminate Flies-- Ways of Exterminating Flies]. [Graphic]. Department of Education, 0AD. https://collections.library.yale.edu/catalog/16047418.
APA, 6th edition
[Exterminate flies-- ways of exterminating flies]. [graphic]. (0 C.E.). [Posters, Lithographs]. Department of Education. https://collections.library.yale.edu/catalog/16047418.