Cards. Invitation to the exposition
MLA
World Emancipation Exposition of Philadelphia (Philadelphia, Pennsylvania). Cards. Invitation to the exposition. Box 2 | Folder 133. 1964 Sep 30-Oct 4. https://collections.library.yale.edu/catalog/11236899.
APA, 6th edition
World Emancipation Exposition of Philadelphia (Philadelphia, Pennsylvania). (["Box 2 | Folder 133"])(1964 Sep 30-Oct 4)[Cards. Invitation to the exposition]. https://collections.library.yale.edu/catalog/11236899.