APA引文
Maps.com (Firm) & ebrary, Inc. (1999). The Gettysburg Campaign, 1862-1863. Maps.com.
Chicago Style (17th ed.) Citation
Maps.com (Firm) and Inc ebrary. The Gettysburg Campaign, 1862-1863. [S.l.]: Maps.com, 1999.
MLA引文
Maps.com (Firm) and Inc ebrary. The Gettysburg Campaign, 1862-1863. Maps.com, 1999.
警告：這些引文格式不一定是100％准確.