Cite

"Lecturer Hsu Ts-deh demonstrating the big materials-testing machine to his class"

MLA

"Lecturer Hsu Ts-Deh Demonstrating the Big Materials-Testing Machine to His Class". 1950. https://collections.library.yale.edu/catalog/16856496.

APA, 6th edition

"Lecturer Hsu Ts-deh demonstrating the big materials-testing machine to his class". (1950). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/16856496.