Because there is no one standard citation style used at CEU:
Ask your professor which style s/he prefers for the course.
Consult a style guide for examples of using various citation styles to create in-text citations, bibliographies and reference lists, or use citation software to assist you in tracking sources used and building in-text citations and bibliographies.
Use a standard style and be consistent with it throughout your paper.
Academic organizations and some disciplines outline their own styles of how to cite sources and format research papers. You may have heard of or used some of the styles before.
Consult these print and online style guides for examples of citing sources in the text of your paper and in a bibliography or reference list. See also information about Using Zotero to Manage Your Sources.