EndNote Basic is available through Web of Science and is available to U of A faculty, staff and students. It allows you to save citations to a personal database and then format those citations in footnotes, end notes, or bibliographies.
Zotero and Mendeley are two of the free citation managers that are commonly used in academic circles; we don't have formalized support for them, but they have help pages and your librarian may be using one or more of them.
Plagiarism is "offering as one’s own work the words, ideas, or arguments of another person without appropriate attribution by quotation, reference, or footnote." (Academic Integrity Sanction Rubric).
Plagiarism and academic dishonesty go beyond cutting and pasting text from another source into your paper without attribution; they can include incomplete paraphrasing, paraphrasing without attribution or including sources that you have not used in the paper in your Works Cited list. . Even copying slides from someone else's file for a presentation may be plagiarism, and the consequences can be very serious. Misrepresenting data or results, or turning in a paper written for one class in another class without the express permission of both professors may constitute academic dishonesty.
Citation styles used vary, and may include those for a particular journal. EndNote Basic will let you choose among hundreds of styles. Use what your department or adviser specifies. Below are links to information about the Chicago style, which, especially in the author date form, is common in science disciplines.