MLA
Rich, Richard H., 1901-1975. Letter from Richard H. Rich, President of Rich's department stores, responding to the letter sent by from Dolores M. Robinson on April 11th, stating that a new restroom for Black women will be added in the near future and that improvements to the restrooms and eating areas in the Basement Store will be made - April 16, 1958. April 16, 1958. Richard H. Rich Papers, 1902-1981. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/389280gbm8-cor.
APA, 6th edition
Rich, Richard H., 1901-1975. (April 16, 1958)[Letter from Richard H. Rich, President of Rich's department stores, responding to the letter sent by from Dolores M. Robinson on April 11th, stating that a new restroom for Black women will be added in the near future and that improvements to the restrooms and eating areas in the Basement Store will be made - April 16, 1958]. Richard H. Rich Papers, 1902-1981, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/389280gbm8-cor.
Chicago
Rich, Richard H., 1901-1975, Letter from Richard H. Rich, President of Rich's department stores, responding to the letter sent by from Dolores M. Robinson on April 11th, stating that a new restroom for Black women will be added in the near future and that improvements to the restrooms and eating areas in the Basement Store will be made - April 16, 1958, April 16, 1958, Richard H. Rich Papers, 1902-1981, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/389280gbm8-cor.