Today we're using Scrivener and Zotero to create citations and a bibliography.
To do this you just need to find out where you want to insert a citation, like here,
then use command+y, ctrl+y on Windows to open Zotero.
You have to set it up inside Scrivener to open Zotero as your bibliography software
Inside Zotero I use command+shift+a, ctrl+shift+a on Windows,
to create a citation, and I return back to Scrivener where I paste in the citation
And I mark it, then to the inspector panel down here, to the comments and footnotes
And insert a footnote.