APA引文
Maps.com (Firm) & ebrary, Inc. (2002). Illinois. Maps.com.
Chicago Style (17th ed.) Citation
Maps.com (Firm) and Inc ebrary. Illinois. [S.l.]: Maps.com, 2002.
MLA引文
Maps.com (Firm) and Inc ebrary. Illinois. Maps.com, 2002.
警告：這些引文格式不一定是100％准確.