MLA
Pach Bros. (New Haven, N.Y.). Berzelius Society in New Haven in 1900. 1900. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/023vt4b8mv-cor.
APA, 6th edition
Pach Bros. (New Haven, N.Y.). (1900)[Berzelius Society in New Haven in 1900]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/023vt4b8mv-cor.
Chicago
Pach Bros. (New Haven, N.Y.), Berzelius Society in New Haven in 1900, 1900, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/023vt4b8mv-cor.