Cite

Unknown photographer Double half-length portrait, black woman holding white child in lap. Ambrotype, sixth plate

MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Double half-length portrait, black woman holding white child in lap. Ambrotype, sixth plate. Box 3, folder 29. circa 1850. https://collections.library.yale.edu/catalog/2002049.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 3, folder 29"])(circa 1850)[Unknown photographer Double half-length portrait, black woman holding white child in lap. Ambrotype, sixth plate]. https://collections.library.yale.edu/catalog/2002049.