Cite

"Dr. Cushing. The 2000th Verified Brain Tumor Operation, 15 April, 1931."

MLA

Boyd, Walter W. (Walter Willard),. "Dr. Cushing. The 2000th Verified Brain Tumor Operation, 15 April, 1931.". 1931. https://collections.library.yale.edu/catalog/15951284.

APA, 6th edition

Boyd, Walter W. (Walter Willard),. (1931)["Dr. Cushing. The 2000th Verified Brain Tumor Operation, 15 April, 1931."]. https://collections.library.yale.edu/catalog/15951284.