Stevenson, Robert Louis with others
MLA
Beinecke, Edwin J. (Edwin John), 1886-1970. Stevenson, Robert Louis with others. Box 65, folder 1493-1494. 1888, undated. https://collections.library.yale.edu/catalog/2032272.
APA, 6th edition
Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 65, folder 1493-1494"])(1888, undated)[Stevenson, Robert Louis with others]. https://collections.library.yale.edu/catalog/2032272.