- ref: ID for anchor. By default, no anchor is generated. The ordinary nonempty value
|ref=IDgenerates an anchor with the given ID; such a linkable reference can be made the target of wikilinks to full references, especially useful in short citations like shortened notes and parenthetical referencing. The special value|ref=harvgenerates an anchor suitable for the {{harv}} template; see anchors for Harvard referencing templates.
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