[Autograph letter 1913-1916, New York, New York, to Isabel Lachaise]
MLA
[Autograph Letter 1913-1916, New York, New York, to Isabel Lachaise]. 0AD. https://collections.library.yale.edu/catalog/2042565.
APA, 6th edition
[Autograph letter 1913-1916, New York, New York, to Isabel Lachaise]. (0 C.E.). [Correspondence, Family papers]. https://collections.library.yale.edu/catalog/2042565.