Footnotes are often used in books, endnotes are often used in magazines, and notes are often used in footnotes of some magazines.
When writing, if you need to quote, try to quote the original text and mark it with "". If a sentence is quoted completely, please put the period in quotation marks and the footnote outside quotation marks. If you only quote half a sentence, put punctuation outside quotation marks, and footnote labels after quotation marks and before punctuation marks.
For example, Kant thinks: "Everyone will admit that a law is considered moral, that is, as the basis of restraint, it must have absolute inevitability." Kant believes that if a law can "serve as the basis of constraint", then "it must have absolute inevitability".
If it is a summary of the cited papers, put the footnote label after the period at the end of the sentence and mark the words "see:" in the footnote. Some magazines require such quotations and notes (sometimes words can't be fully expressed, and parenthesis affects words, so they are expressed in the form of notes) as footnotes, instead of being put into references.
This is very important. Because readers can get relevant information from your comments. Therefore, footnotes are an important reason why research cup papers can win prizes.