APA引文

Guelzo, A. C. (2013). Gettysburg: The last invasion.

Chicago Style (17th ed.) Citation

Guelzo, Allen C. Gettysburg: The Last Invasion. 2013.

MLA引文

Guelzo, Allen C. Gettysburg: The Last Invasion. 2013.

警告：這些引文格式不一定是100％准確.