Doctor's Sign
MLA
Johnson, Edgar M., MD, Streeter, Edward Clark (1874-1947). Doctor's Sign. Box 057. early 20th century. https://collections.library.yale.edu/catalog/17318826.
APA, 6th edition
Johnson, Edgar M., MD, & Streeter, Edward Clark (1874-1947). (["Box 057"])(early 20th century)[Doctor's Sign]. https://collections.library.yale.edu/catalog/17318826.