Cite

[I must take a bath at least once a week] [graphic].

MLA

[I Must Take a Bath at Least Once a Week] [Graphic]. Ministry of Health, 0AD. https://collections.library.yale.edu/catalog/16047626.

APA, 6th edition

[I must take a bath at least once a week] [graphic]. (0 C.E.). [Posters, Offset lithographs]. Ministry of Health. https://collections.library.yale.edu/catalog/16047626.