Cite

George A. Kubler's notes on the Focillon method, January 26, 1940, page 1.

MLA

Kubler, George A. George A. Kubler's Notes on the Focillon Method, January 26, 1940, Page 1. 1940. https://collections.library.yale.edu/catalog/10020011.

APA, 6th edition

Kubler, G. A. (1940). George A. Kubler's notes on the Focillon method, January 26, 1940, page 1. [Paper]. https://collections.library.yale.edu/catalog/10020011.