Cita APA (7a ed.)

Weston, G. M. (1857). The progress of slavery in the United States. The Author.

Cita Chicago Style (17a ed.)

Weston, George M. The Progress of Slavery in the United States. Washington, D.C.: The Author, 1857.

Cita MLA (8a ed.)

Weston, George M. The Progress of Slavery in the United States. The Author, 1857.