MLA

Carl Ludwig, D. B. Kagenaar, Fulton, John Farquhar (1899-1960). Kymograph. Box 007. ca. mid-late 19th century. https://collections.library.yale.edu/catalog/17316636.

APA, 6th edition

Carl Ludwig, & D. B. Kagenaar, & Fulton, John Farquhar (1899-1960). (["Box 007"])(ca. mid-late 19th century)[Kymograph]. https://collections.library.yale.edu/catalog/17316636.