APA引文

Northup, S., & Allen, R. (2013). Twelve years a slave. Dreamscape Media.

Chicago Style (17th ed.) Citation

Northup, Solomon, and Richard Allen. Twelve Years a Slave. [Holland, Ohio]: Dreamscape Media, 2013.

MLA引文

Northup, Solomon, and Richard Allen. Twelve Years a Slave. Dreamscape Media, 2013.

警告：這些引文格式不一定是100％准確.