When you use Oxford referencing
Oxford referencing is a footnote system. A superscript number in your text points to a note at the bottom of the page carrying the full source details, and a bibliography at the end lists everything alphabetically. If your course in the UK or Australia asks for footnote referencing and it is not law, this is usually what it means.
Like Harvard, Oxford is a convention rather than a single published rulebook. Different universities print slightly different versions, and the name gets used loosely for documentary note styles in general. The core is stable though: author in normal order, title in italics for books, publication details in parentheses, then the page you are citing.
One more naming trap worth clearing up. If you are a law student, your course almost certainly wants OSCOLA, which is a specific Oxford-published standard for legal citation with its own strict rules. OSCOLA has its own generator and guide on this site. This page covers general Oxford footnote referencing for history, politics, literature and similar subjects.
The formats, with real examples
Paste your source into the tool above and it fills these in for you. If you would rather see the pattern, here is exactly what each one looks like.
In-text citations
The bibliography inverts the author's name for alphabetical sorting and drops page numbers. Footnotes keep the name in normal order and always give the specific page.