MLA
J. Milner & Son (Florence, Ala.). Advertising : Florence, Alabama where cotton is king, an African American boy playing a banjo on a bale of cotton, and a photo of the Lauderdale County Courthouse. February 24, 1921. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wm69-cor.
APA, 6th edition
J. Milner & Son (Florence, Ala.). (February 24, 1921)[Advertising : Florence, Alabama where cotton is king, an African American boy playing a banjo on a bale of cotton, and a photo of the Lauderdale County Courthouse]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wm69-cor.
Chicago
J. Milner & Son (Florence, Ala.), Advertising : Florence, Alabama where cotton is king, an African American boy playing a banjo on a bale of cotton, and a photo of the Lauderdale County Courthouse, February 24, 1921, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wm69-cor.