American Colonization Society, Clay, H., Barton, W. E., & William E. Barton Collection of Lincolniana. (1849). Certificate of membership: Washington, D.C.
Chicago Style (17th ed.) CitationAmerican Colonization Society, Henry Clay, William E. Barton, and William E. Barton Collection of Lincolniana. Certificate of Membership: Washington, D.C. 1849.
MLA (8th ed.) CitationAmerican Colonization Society, et al. Certificate of Membership: Washington, D.C. 1849.
Warning: These citations may not always be 100% accurate.