MLA
Guercino, 1591-1666, artist. Sereniss. Mantuae Duci Ferdinando Gonzaghae DD.. XXXX. Views of Rome Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxpqmk-cor.
APA, 6th edition
Guercino, 1591-1666, artist. (XXXX)[Sereniss. Mantuae Duci Ferdinando Gonzaghae DD.]. Views of Rome Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxpqmk-cor.
Chicago
Guercino, 1591-1666, artist, Sereniss. Mantuae Duci Ferdinando Gonzaghae DD., XXXX, Views of Rome Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxpqmk-cor.