APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：这些引文格式不一定是100％准确.