Many reasons this happens:
Consult with a librarian or your professors on what to cite as well as how to cite
Read about citation styles in:
Students are responsible for knowing and understanding what constitutes plagiarism, unintentional or not.
Basic instructions on citing:
Places where you might find data you are required to cite:
Librarians are available to work with you so you are informed about the citation and research process.
Citations are located in the text of an article, paper, manuscript or book. It is called an in-text citation.
The MWU Student Handbook explains "Academic Honesty" in Appendices 1-4. Plagiarism is an act of Academic Misconduct.
Plagiarism: Presenting as one’s own the work of another without proper acknowledgment; deceitful practice, utilizing a substitute or acting as a substitute in any academic evaluation, of knowingly permitting one’s work to be submitted by another person without the instructor’s authorization.
Fortunately, we are here to work with you to understand what constitutes plagiarism and how you can avoid this.