In the writing community, a vividly discussed question is where to place references to footnotes in the text.

Some authorities have already given precise answers to this question:

The Chicago Manual of Style and the Modern Language Association suggest to place footnotes at the end of a sentence, following the punctuation mark (except for dashes). [CMOS, MLA]

In general, footnotes tend to disturb the reader’s concentration on the red line of the text. Therefore, footnotes should not appear after single words, but rather at the end of phrases or sentences.