Cite

[I must brush my teeth every morning and night] [graphic].

MLA

[I Must Brush My Teeth Every Morning and Night] [Graphic]. Ministry of Health, 0AD. https://collections.library.yale.edu/catalog/16047611.

APA, 6th edition

[I must brush my teeth every morning and night] [graphic]. (0 C.E.). [Posters, Offset lithographs]. Ministry of Health. https://collections.library.yale.edu/catalog/16047611.