Of course Stedman follows his own convention! He would be a hypocrite and a bad writer if he did not. Armadillo Roadkill is one of the annoyances that Stedman listed and it's defined as putting in a quote without first introducing it. How he follows this is when he is doing an example of Uncle Barry and His Encyclopedia of Useless Information. In the example he states "Addressing this issue, David M. Potter comments, “Whether Seward meant this literally or not, it was in fact a singularly accurate forecast for territorial Kansas” (199). (248)" He introduces the quote with "Adressing this issue" and stating his sources name.