The UNT Libraries provide both print style manuals and links to citation style guides online. Check your grant proposal assignment to see which citation style you should use for your in-text and reference list citations.
MLA is the citation style of the Modern Language Association and is normally used in the fields of humanities and liberal arts. APA is the citation style of the American Psychological Association and is normally used in the field of social sciences and sciences. Both associations publish manuals that tell you exactly how to do in-text and reference list citations, and many universities provide online abridged guides for students.