When you use information from authors in your writing, you must give credit to that author or else you are committing plagiarism.
The first part of giving credit to an author is creating in-text citations. In-text citations signify that the words inside of a set of quotation marks are not your own.
A properly formatted in-text citation will include information about where you found the quote and who wrote it.
The second part of giving credit to authors is creating a list of the sources that you cited in your paper.
In MLA Style, this list is referred to as a A Works Cited List and it is an alphabetical list of the sources you use to write your paper.
ACC Libraries Tutorial -- Academic Honesty/Plagiarism
ACC Libraries Research Guide -- Citing Sources & Plagiarism
"What is Intellectual Property" by Donald Smith, Chipperson Law is licensed under CC BY-NC-ND 4.0
World Trade Organization - What Are Intellectual Property Rights?
United States Department of State - Intellectual Property Enforcement