MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. William Hole watercolor drawings (13) for Kidnapped. Box 67, folder 1559-1562. [1887]. https://collections.library.yale.edu/catalog/17297498.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 67, folder 1559-1562"])([1887])[William Hole watercolor drawings (13) for Kidnapped]. https://collections.library.yale.edu/catalog/17297498.