MLA

Stanford, Frank, 1949-. [Early poems]. Uncatalogued writings, box 2 | Folder : Early poems. 4B. undated. https://collections.library.yale.edu/catalog/12048774.

APA, 6th edition

Stanford, Frank, 1949-. (["Uncatalogued writings, box 2 | Folder : Early poems. 4B"])(undated)[[Early poems]]. https://collections.library.yale.edu/catalog/12048774.