Footnotes are used to give credit but also to offer additional information.
A footnote can be used to present bibliographic material related to the subject of an article. For example:
(Content, Content, Content) The author writes, "I experienced two different worlds growing up in a middle class, suburban neighborhood.... I lived another life, every summer, vacationing at a rustic cabin on a lake in Ontario..."1 (Content, Content, Content)
1 James Collins, One Man's Mile , (General Store Publishing House, Renfrew, Ontario, 2004)
This footnote gives credit to the author, but also points to further content on the subject. There are different footnote formats depending on where and why the footnote is placed in the text. You would use a footnote to give credit for content and to point readers to more information on the subject. You can also use this type of entry to build a bibliography.
In a website article, the simplest thing to do is to give credit for content and add a link to more information on a subject.
Next, we'll take a look at giving credit for an idea or concept.