APA引文

Harrison, B. C. (2011). A more perfect union. New York: McGraw Hill.

Trích dẫn kiểu Chicago

Harrison, Brigid C. A More Perfect Union. New York: McGraw Hill, 2011.

MLA引文

Harrison, Brigid C. A More Perfect Union. New York: McGraw Hill, 2011.

警告：這些引文格式不一定是100％准確.