MLA
Dugged, Leonard. Colonization of Free Blacks : Memorial of Leonard Dugged, George A. Bailey, and 240 Other Free Colored Persons of California, Praying Congress to Provide Means for Their Colonization to Some Country in Which Their Color Will Not Be a Badge of Degradation : January 16, 1862 : Laid on the Table, and Ordered to Be Printed. [United States Congress?], 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj7jm-cor.
APA, 6th edition
Dugged, L. (1862). Colonization of free blacks : memorial of Leonard Dugged, George A. Bailey, and 240 other free colored persons of California, praying Congress to provide means for their colonization to some country in which their color will not be a badge of degradation : January 16, 1862 : laid on the table, and ordered to be printed. [African American pamphlet., African American author.]. [United States Congress?]; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj7jm-cor.
Chicago
Dugged, Leonard. “Colonization of Free Blacks : Memorial of Leonard Dugged, George A. Bailey, and 240 Other Free Colored Persons of California, Praying Congress to Provide Means for Their Colonization to Some Country in Which Their Color Will Not Be a Badge of Degradation : January 16, 1862 : Laid on the Table, and Ordered to Be Printed.” African American pamphlet., African American author. African American Imprints Collection. [Washington, D.C.]: [United States Congress?], 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj7jm-cor.