Cite

Kubler's notes on the Focillon method, January 26, 1940, page 3.

MLA

Kubler, George A. Kubler's Notes on the Focillon Method, January 26, 1940, Page 3. 1940. https://collections.library.yale.edu/catalog/10020013.

APA, 6th edition

Kubler, G. A. (1940). Kubler's notes on the Focillon method, January 26, 1940, page 3. [Paper]. https://collections.library.yale.edu/catalog/10020013.