Cite

"The Age of Electricity."

MLA

Hansen, Bert, 1944-. "The Age of Electricity.". Box 7. 1891 September 19. https://collections.library.yale.edu/catalog/32326910.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 7"])(1891 September 19)["The Age of Electricity."]. https://collections.library.yale.edu/catalog/32326910.