APA引文

Northup, S. (2013). Twelve years a slave. eStar Books.

Chicago Style (17th ed.) Citation

Northup, Solomon. Twelve Years a Slave. Prineville: eStar Books, 2013.

MLA引文

Northup, Solomon. Twelve Years a Slave. eStar Books, 2013.

警告：這些引文格式不一定是100％准確.