MLA

National Association for the Advancement of Colored People (New York, New York). [Letter : Concerning J.D. Goss, The White Man's Candidate]. Box 1 | Folder 7. 1920 April 30. https://collections.library.yale.edu/catalog/16173684.

APA, 6th edition

National Association for the Advancement of Colored People (New York, New York). (["Box 1 | Folder 7"])(1920 April 30)[[Letter : Concerning J.D. Goss, The White Man's Candidate]]. https://collections.library.yale.edu/catalog/16173684.