If you want to provide your readers with references to, or sources for, your text, then footnotes and endnotes are perfect.
Footnotes appear at the end of each page in a document.
Endnotes appear at the end of a document. You can include both footnotes and endnotes in the same document. For example, you can use footnotes for detailed comments and then use endnotes for the citation of sources. You can automatically number the note reference marks, or you can create your own custom marks. If you add, delete, or move your automatically numbered footnotes or endnotes, then Gobe Productive renumbers them to accommodate your change.