Secondary source citation in MS Word 2010?

I don't completely understand your question. You can insert more than 1 footnote at any location. The keyboard shortcut for inserting a footnote is Ctrl-Alt-F.

If your question is about referring one footnote to another e.g. footnote 3 says refer to footnote 1 for the citation, you will have to do this manually.

I think the real answer here depends on the format that you are using. APA and MLA formats will tell you exactly how footnotes are handled in their format.

EDIT: APA is American Psychological Association and MLA is Modern Language Association which are widely used formats for academic papers in the USA.

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