13 - Footnotes
Section outline
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                    The number (1, 2, ... n) or sign (*) indicating a footnote comes after the full stop at the end of the sentence. It is also quite rare in English to put a footnote reference in the middle of the sentence. 
 ...as the author's point out in her major biography.1
 1. Fraser, A., Cromwell: Our Chief of Men.
 NB: the numbers and signs are in small, raised characters!