Cite

[Photographic postcard of Marsden Hartley with inscription to Arnold Ronnebeck]

MLA

[Photographic Postcard of Marsden Hartley with Inscription to Arnold Ronnebeck]. 1923. https://collections.library.yale.edu/catalog/2067985.

APA, 6th edition

[Photographic postcard of Marsden Hartley with inscription to Arnold Ronnebeck]. (1923). [Correspondence, Inscriptions, Photographic postcards]. https://collections.library.yale.edu/catalog/2067985.