Add a comma after the citation

Error²Federal courts, Illinois courts21st and 22nd editions

A case named for the first time in a running sentence carries its full citation, set off by a comma at each end; the closing comma follows the court-and-date parenthetical, where the sentence resumes.¹

1. 1B10.1.1 Case Names. Tables: R. 10.2.1(c) Abbreviations.
2. 2An error: the rule in note 1 allows one form, and this is not it.