Here's an example:
> "The use of social media has been shown to have a significant impact on self-esteem" (Smith, 2023).
Note: The specific format of the citation will depend on the citation style you are using (e.g., APA, MLA, Chicago).
Here are some additional points:
* If you are directly quoting a source, you must also include the page number in the citation.
* If you are citing multiple sources in the same sentence, separate them with a semicolon.
* Avoid ending a sentence with a citation. You should aim to integrate the citation seamlessly into your sentence.
It's important to be consistent with your citation format throughout your essay and to always double-check your citations for accuracy.