Cite

Unknown photographer Man with derby hat leaning on very large tree. Later 19th century photograph, mounted on card. 10 x 8

MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Man with derby hat leaning on very large tree. Later 19th century photograph, mounted on card. 10 x 8. Box 16, folder 747. circa 1895. https://collections.library.yale.edu/catalog/2042502.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 16, folder 747"])(circa 1895)[Unknown photographer Man with derby hat leaning on very large tree. Later 19th century photograph, mounted on card. 10 x 8]. https://collections.library.yale.edu/catalog/2042502.