Cite

[Postcard : 1913 January 18, Marsden Hartley to Norma Berger]

MLA

[Postcard : 1913 January 18, Marsden Hartley to Norma Berger]. 1913. https://collections.library.yale.edu/catalog/11176991.

APA, 6th edition

[Postcard : 1913 January 18, Marsden Hartley to Norma Berger]. (1913). [Correspondence, Photographic postcards]. https://collections.library.yale.edu/catalog/11176991.