Chicago note example: Web site. The note starts with an indent and the note number 21. The title of the Web site is Chesapeake and Ohio Canal National Historical Park and is followed by a comma. The sponsor of the Web site is National Park Service followed by a comma. The words last modified are followed by the date of update (modified). April 9, 2010 followed by a comma. The URL is http://www.nps.gov/choh/index.htm.