Cite

The Essex Fields Try to Push Their Verdure Through, holograph, signed

MLA

Betjeman, John, 1906-1984. The Essex Fields Try to Push Their Verdure Through, holograph, signed. Box 3, folder 162. undated. https://collections.library.yale.edu/catalog/17306192.

APA, 6th edition

Betjeman, John, 1906-1984. (["Box 3, folder 162"])(undated)[The Essex Fields Try to Push Their Verdure Through, holograph, signed]. https://collections.library.yale.edu/catalog/17306192.