Cite

"One drop of this stuff behind your ear..."

MLA

Harrington, Oliver W. (Oliver Wendell), 1912-1995. "One drop of this stuff behind your ear...". Box 3 (Oversize). undated. https://collections.library.yale.edu/catalog/33075314.

APA, 6th edition

Harrington, Oliver W. (Oliver Wendell), 1912-1995. (["Box 3 (Oversize)"])(undated)["One drop of this stuff behind your ear..."]. https://collections.library.yale.edu/catalog/33075314.