To Poesie - Manuscript in an unidentified hand.
MLA
Ruskin, John, 1819-1900. To Poesie - Manuscript in an unidentified hand.. Box 31. undated. https://collections.library.yale.edu/catalog/2020263.
APA, 6th edition
Ruskin, John, 1819-1900. (["Box 31"])(undated)[To Poesie - Manuscript in an unidentified hand.]. https://collections.library.yale.edu/catalog/2020263.