Many tend to select footnotes as their default because that is what we learned in school. But the choice will depend on your readers and context.
Footnotes are more appropriate in an academic context, where readers will likely want to check the sources as they read. Research or technical reports in a workplace environment may also benefit from this approach.
However, the ASG recommends endnotes for most workplace documents, and certainly for documents to be read by the public.
Listing the sources cited in a single endnote list at the end of a text or section makes them available for those who want them while they read without interrupting the flow of reading for the majority who may only want to check an occasional source.
Of course, in shorter texts, you will likely not need either footnotes or endnotes at all. If you find yourself adding only 1 or 2 in-text citations, see if you can incorporate the reference within the text instead.
Above all, do not default to using footnotes just because it looks more ‘authoritative’, as the reading experience may suffer.
