MLA

Marinetti, F. T., 1876-1944. Leonhard Adam. “Das Ratsel des Totemismus.” No source, 1925. [3916-1]-[3919-1]. box 50, slide 16-19. 1925. https://collections.library.yale.edu/catalog/10654919.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 50, slide 16-19"])(1925)[Leonhard Adam. “Das Ratsel des Totemismus.” No source, 1925. [3916-1]-[3919-1]]. https://collections.library.yale.edu/catalog/10654919.