MLA
Rich, Richard H., 1901-1975. Letter from Richard H. Rich, President of Rich's department stores, responding to the letter sent by J. S. Flipper and M. L. Wingfield of the Woman's Club of Atlanta on June 19th, stating that a new restroom for Black women customers will be added and that improvements to the restrooms and eating areas in the Basement Store will be made - June 20, 1958. June 20, 1958. Richard H. Rich Papers, 1902-1981. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/750tqjq2td-cor.
APA, 6th edition
Rich, Richard H., 1901-1975. (June 20, 1958)[Letter from Richard H. Rich, President of Rich's department stores, responding to the letter sent by J. S. Flipper and M. L. Wingfield of the Woman's Club of Atlanta on June 19th, stating that a new restroom for Black women customers will be added and that improvements to the restrooms and eating areas in the Basement Store will be made - June 20, 1958]. Richard H. Rich Papers, 1902-1981, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/750tqjq2td-cor.
Chicago
Rich, Richard H., 1901-1975, Letter from Richard H. Rich, President of Rich's department stores, responding to the letter sent by J. S. Flipper and M. L. Wingfield of the Woman's Club of Atlanta on June 19th, stating that a new restroom for Black women customers will be added and that improvements to the restrooms and eating areas in the Basement Store will be made - June 20, 1958, June 20, 1958, Richard H. Rich Papers, 1902-1981, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/750tqjq2td-cor.