Q. How do I cite something from a dictionary or online encyclopedia like Wikipedia?
If you are using an online bibliographic referencing tool, then select to create a reference of type "Dictionary" or "Encyclopedia" -- and put in the link.
In your Works Cited or Bibliography, the Wikipedia entry should look like this in the alphabetical listing -- in MLA style:
And in the body of your paper, this information source can be referenced using an in-text citation like this -- in MLA style:
“In chaos theory, the butterfly effect is the sensitive dependence on initial conditions in which a small change in one state of a deterministic nonlinear system can result in large differences in a later state.” ("Butterfly Effect").