More Words, Deeper Hole

<looks it up> Looks like there was some confusion because the reference was in external links rather than being footnoted from the sentence it referred to. Someone deleted it from the external links (presumably thinking it wasn't an important enough link to be included, and not realising it was the source for your statement) and so the citation needed link was added later.

I've fixed it now. If it's useful in future, I generally cite sources using the <ref>(source)</ref> tags right after the sentence they belong to -- that creates a numbered footnote linked to the (source) details in the references lists.