Louisa to mother
MLA
Siefert, Louisa, 1845-1877. Louisa to mother. Box 3 | Folder 49. 1873-1874. https://collections.library.yale.edu/catalog/17311531.
APA, 6th edition
Siefert, Louisa, 1845-1877. (["Box 3 | Folder 49"])(1873-1874)[Louisa to mother]. https://collections.library.yale.edu/catalog/17311531.