MLA

Society, New Bedford Anti Slavery. New Bedford Anti Slavery Society Minute Book : Manuscript. 1834. https://collections.library.yale.edu/catalog/33353286.

APA, 6th edition

Society, N. B. A. S. (1834). New Bedford Anti Slavery Society minute book : manuscript [Constitution, Constitutions, Minutes (administrative records) Massachusetts 19th century, Legal documents Massachusetts 19th century, Manuscripts]. https://collections.library.yale.edu/catalog/33353286.