Cite

Sidewalk Clock. Beacon, New York (NBF-163-136)

MLA

Plowden, David (1932). Sidewalk Clock. Beacon, New York (NBF-163-136). Box 55. 1963 January. https://collections.library.yale.edu/catalog/2041322.

APA, 6th edition

Plowden, David (1932). (["Box 55"])(1963 January)[Sidewalk Clock. Beacon, New York (NBF-163-136)]. https://collections.library.yale.edu/catalog/2041322.