Oxford is a citation style that uses footnotes at the bottom of the page unlike in-text citation styles such as Harvard and APA. This guide is a brief description of the Oxford citation style described in:
Style Manual for Authors, Editors and Printers, 6th edn., Canberra, ACT, AGPS, 2002.
Before you write your Reference List or Bibliography, check with your lecturer/tutor which style they prefer you to use and refer to the instructions included with your assignment.
Information about why you need to reference is available in the Referencing & plagiarism guide.