Citations in a Paper After the Whole Quotation is Shown
I'd look for some form of "short citation" format in whatever style you are using. E.g. the first time around give the full citation, and later on the short one. Another technique would be to cite once, and then just go "As Leauthor says, ...", or even just try to keep all this together. If it is a long discussion, you might even dedicate a (sub)section to this, using sectioning to have it hang together.

In LaTeX/BibTeX I use the plain citation style, which gives a unintrusive [42] only. But that is major surgery...