"Copy Books"
MLA
Beinecke, Edwin J. (Edwin John), 1886-1970. "Copy Books". Box 37, folder 843-847. [1866-1872], undated. https://collections.library.yale.edu/catalog/16609877.
APA, 6th edition
Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 37, folder 843-847"])([1866-1872], undated)["Copy Books"]. https://collections.library.yale.edu/catalog/16609877.