Drake, S. A. (2001). The battle of Gettysburg, 1863. Digital Scanning.
芝加哥风格引文Drake, Samuel Adams. The Battle of Gettysburg, 1863. Scituate, Mass.: Digital Scanning, 2001.
MLA引文Drake, Samuel Adams. The Battle of Gettysburg, 1863. Digital Scanning, 2001.
警告：这些引文格式不一定是100％准确.