X8 Output Style - Numbered with exponent

So do you want footnotes/endnotes or a reference bibliography list?  They are very different.  

Footnotes are superscripts and you use the word tools to insert a footnote and then you insert the citation into the footnote. These result in ibid, etc.  You can have “footnotes” at the end of the chapter, I think.  Then they are called “endnotes”.  

A numbered style works completely differently and will reuse the number and so never uses ibid.