Template:Citation Style documentation/ref

• ref: the citation's HTML anchor identifier. When set, |ref=ID generates an anchor with the given ID (the id attribute in the citation's <cite id="ID"> HTML tag). Setting |ref=ID identifies the template as a target and allows wikilinking to full references, especially useful with short-form citations like Shortened footnotes and parenthetical referencing. The special value |ref=harv generates an anchor identifier suitable for use with {{sfn}}

{{sfn}} and {{harv}}

{{harv}} templates. For |mode=cs2 |ref= defaults to |ref=harv.

See Template:Citation/doc § Anchors for Harvard referencing templates.