Cite

[Postcard : 1915 November 29, Arnold Ronnebeck to Marsden Hartley]

MLA

[Postcard : 1915 November 29, Arnold Ronnebeck to Marsden Hartley]. 1915. https://collections.library.yale.edu/catalog/11176906.

APA, 6th edition

[Postcard : 1915 November 29, Arnold Ronnebeck to Marsden Hartley]. (1915). [Correspondence, Drawings, Postcards]. https://collections.library.yale.edu/catalog/11176906.