P1450-P1950
MLA
Williams, Jonathan, 1929-2008. P1450-P1950. Box 49. circa 1951-circa 1997. https://collections.library.yale.edu/catalog/11701747.
APA, 6th edition
Williams, Jonathan, 1929-2008. (["Box 49"])(circa 1951-circa 1997)[P1450-P1950]. https://collections.library.yale.edu/catalog/11701747.