Cite

[Photographic postcard of the bust of Marsden Hartley]

MLA

Ronnebeck, Arnold, 1885-1947. [Photographic postcard of the bust of Marsden Hartley]. Box 6. Undated. https://collections.library.yale.edu/catalog/2067986.

APA, 6th edition

Ronnebeck, Arnold, 1885-1947. (["Box 6"])(Undated)[[Photographic postcard of the bust of Marsden Hartley]]. https://collections.library.yale.edu/catalog/2067986.