Boolean operators are used to connect and define the relationship between search terms and are used to either narrow or broaden a search.

There are three Boolean operators. They are:

AND

OR

NOT

Resources for citation help in APA, Chicago, and MLA format.

Evaluating sources means recognizing whether the information you read and include in your research is credible. Despite the large amount of information available, both in print and online, not all of it is valid, useful, or accurate. Evaluating sources of information that you might include in your writing is an important step in any research process.

The Online Writing Lab (OWL) at Purdue University houses writing resources and instructional material, and provides these as a free service of the Writing Lab at Purdue. Students, members of the community, and users worldwide will find information to assist with many writing projects.

https://owl.purdue.edu/owl/purdue_owl.html