Cite

[I must cover my mouth and nose with a handkerchief when coughing or sneezing] [graphic].

MLA

[I Must Cover My Mouth and Nose with a Handkerchief When Coughing or Sneezing] [Graphic]. Ministry of Health, 0AD. https://collections.library.yale.edu/catalog/16047620.

APA, 6th edition

[I must cover my mouth and nose with a handkerchief when coughing or sneezing] [graphic]. (0 C.E.). [Posters, Offset lithographs]. Ministry of Health. https://collections.library.yale.edu/catalog/16047620.