Cite

2 autograph letters, signed, to Hugh Allen.

MLA

Ruskin, John, 1819-1900. 2 autograph letters, signed, to Hugh Allen.. Box 7. undated. https://collections.library.yale.edu/catalog/16652817.

APA, 6th edition

Ruskin, John, 1819-1900. (["Box 7"])(undated)[2 autograph letters, signed, to Hugh Allen.]. https://collections.library.yale.edu/catalog/16652817.