Cite

Thus Sidmouth looked an hundred years ago," holograph

MLA

Betjeman, John, 1906-1984. Thus Sidmouth looked an hundred years ago," holograph. Box 3, folder 215. undated. https://collections.library.yale.edu/catalog/17306201.

APA, 6th edition

Betjeman, John, 1906-1984. (["Box 3, folder 215"])(undated)[Thus Sidmouth looked an hundred years ago," holograph]. https://collections.library.yale.edu/catalog/17306201.