MLA
Stevens, W., and T. Thompson. Four Days in May, 1969, Materials Regarding the Student Demonstrations at Emory between May 25th and 28th, 1969 - Correspondence - Letter from T. Thompson and W. Stevens to the Department Chairmen at Emory University Asking for Feedback and Comments Regarding a Number of Questions Offered by Professor Theodore R. Weber Relating to Race in Higher Education - April 11, 1968. 1968. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 8. https://digital.library.emory.edu/purl/0515mkkx77-cor.
APA, 6th edition
Stevens, W., & Thompson, T. (1968). Four days in May, 1969, Materials regarding the student demonstrations at Emory between May 25th and 28th, 1969 - Correspondence - Letter from T. Thompson and W. Stevens to the department chairmen at Emory University asking for feedback and comments regarding a number of questions offered by Professor Theodore R. Weber relating to race in higher education - April 11, 1968 (Box 1, Folder 8) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkx77-cor.
Chicago
Stevens, W., and T. Thompson. “Four Days in May, 1969, Materials Regarding the Student Demonstrations at Emory between May 25th and 28th, 1969 - Correspondence - Letter from T. Thompson and W. Stevens to the Department Chairmen at Emory University Asking for Feedback and Comments Regarding a Number of Questions Offered by Professor Theodore R. Weber Relating to Race in Higher Education - April 11, 1968.” Letters (correspondence). Emory University Desegregation Collection, 1968. Box 1, Folder 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkx77-cor.