6. Paris. FTM with Gustave Kahn. Inscribed by LBM on verso: "FTM and Gustave Kahn." Stamped on verso: "Copyright. - World's Graphic Press Paris. 39, Rue de Châteaudun, Paris."
MLA
Marinetti, F. T., 1876-1944. 6. Paris. FTM with Gustave Kahn. Inscribed by LBM on verso: "FTM and Gustave Kahn." Stamped on verso: "Copyright. - World's Graphic Press Paris. 39, Rue de Châteaudun, Paris.". Box 49, folder 1937. ca. 1910. https://collections.library.yale.edu/catalog/2008335.
APA, 6th edition
Marinetti, F. T., 1876-1944. (["Box 49, folder 1937"])(ca. 1910)[6. Paris. FTM with Gustave Kahn. Inscribed by LBM on verso: "FTM and Gustave Kahn." Stamped on verso: "Copyright. - World's Graphic Press Paris. 39, Rue de Châteaudun, Paris."]. https://collections.library.yale.edu/catalog/2008335.