[Letter : 1913 April 30, Gabriele Münter to Marsden Hartley]
MLA
Munter, Gabriele, 1877-1962. [Letter : 1913 April 30, Gabriele Münter to Marsden Hartley]. Box 11 | Folder: Misc. single letters, K-M. 1913 April 30. https://collections.library.yale.edu/catalog/16721055.
APA, 6th edition
Munter, Gabriele, 1877-1962. (["Box 11 | Folder: Misc. single letters, K-M"])(1913 April 30)[[Letter : 1913 April 30, Gabriele Münter to Marsden Hartley]]. https://collections.library.yale.edu/catalog/16721055.