"Federico Garcia Lorca"
MLA
Williams, William Carlos, 1883-1963. "Federico Garcia Lorca". Box 40, folder 1033. circa 1960. https://collections.library.yale.edu/catalog/11870013.
APA, 6th edition
Williams, William Carlos, 1883-1963. (["Box 40, folder 1033"])(circa 1960)["Federico Garcia Lorca"]. https://collections.library.yale.edu/catalog/11870013.