Cite

"The Age of Invention."

MLA

Hansen, Bert, 1944-. "The Age of Invention.". Box 7. 1891 October 31. https://collections.library.yale.edu/catalog/32326914.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 7"])(1891 October 31)["The Age of Invention."]. https://collections.library.yale.edu/catalog/32326914.