Cite

"I bought four bottles of beer..."

MLA

Harrington, Oliver W. (Oliver Wendell), 1912-1995. "I bought four bottles of beer...". Box 25. undated. https://collections.library.yale.edu/catalog/33075435.

APA, 6th edition

Harrington, Oliver W. (Oliver Wendell), 1912-1995. (["Box 25"])(undated)["I bought four bottles of beer..."]. https://collections.library.yale.edu/catalog/33075435.