199. Sofia, Bulgaria. FTM and BCM in a group. Inscribed on verso: "a Sofia."
MLA
Marinetti, F. T., 1876-1944. 199. Sofia, Bulgaria. FTM and BCM in a group. Inscribed on verso: "a Sofia.". Box 50, folder 1949. 1932 Jan 19. https://collections.library.yale.edu/catalog/2008928.
APA, 6th edition
Marinetti, F. T., 1876-1944. (["Box 50, folder 1949"])(1932 Jan 19)[199. Sofia, Bulgaria. FTM and BCM in a group. Inscribed on verso: "a Sofia."]. https://collections.library.yale.edu/catalog/2008928.