MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. [Dunoon. Visit in 1870 to a House Where R.L.S. Had Spent a Week in Childhood] (6174). Box 29, folder 669. undated. https://collections.library.yale.edu/catalog/2041607.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 29, folder 669"])(undated)[[Dunoon. Visit in 1870 to a House Where R.L.S. Had Spent a Week in Childhood] (6174)]. https://collections.library.yale.edu/catalog/2041607.