Content from websites and webpages (aside from books, journal articles, and other formally published sources) can be cited in a note rather than the bibliography. If a bibliography entry is required, see 14.104 of the Chicago Manual of Style.
Example 1 – General Webpage
N: 1. "The History of the Golden Arches," McDonald's Corporation, accessed February 24, 2015, http://www.mcdonalds.ca/ca/en/our_story/our_history.html.
Example 2 – Wikipedia Article
N: 1. "Ferruginous Hawk," Wikipedia, Wikimedia Foundation, last modified November 8, 2017, 15:06, https://en.wikipedia.org/wiki/Ferruginous_hawk.