MLA

Marinetti, F. T., 1876-1944. Full page of a Bulgarian periodical. Signed photo of Marinetti, dated 1938. [9587-1]. box 121, slide 7. 1938. https://collections.library.yale.edu/catalog/10664928.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 121, slide 7"])(1938)[Full page of a Bulgarian periodical. Signed photo of Marinetti, dated 1938. [9587-1]]. https://collections.library.yale.edu/catalog/10664928.