Footnotes and source references are two very different things.

Typically the footnote should only appear once in the document although you can choose to cross refer to a footnote if you wish. If you want the same footnote to appear on multiple pages then you need to insert it a second time.

Source references should appear once the document bibliography (in a similar way to endnotes). You can have multiple 'in text references' to the same source but the reference only gets one expanded version in the bibliography.

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Andrew Lockton
Chrysalis Design, Melbourne Australia