Cite

Schloss, Sophie (to Herminie d'Alcain Offenbach)

MLA

Koch, Frederick R. (Frederick Robinson). Schloss, Sophie (to Herminie d'Alcain Offenbach). Box 47, folder 942. n.d.. https://collections.library.yale.edu/catalog/2039612.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 47, folder 942"])(n.d.)[Schloss, Sophie (to Herminie d'Alcain Offenbach)]. https://collections.library.yale.edu/catalog/2039612.