Walser, Robert: correspondence and poem: Handharfe am Tag
MLA
Wolff, Kurt, 1887-1963. Walser, Robert: correspondence and poem: Handharfe am Tag. Box 8, folder 335. 1912-19, n.d.. https://collections.library.yale.edu/catalog/10613753.
APA, 6th edition
Wolff, Kurt, 1887-1963. (["Box 8, folder 335"])(1912-19, n.d.)[Walser, Robert: correspondence and poem: Handharfe am Tag]. https://collections.library.yale.edu/catalog/10613753.