Replace the period with a comma
Error2Federal courts, Illinois courts21st and 22nd editions
A citation clause is set off by commas on both sides; the closing period belongs only to the clause that ends the sentence it sits in.1
- 1B1.1 Citation Sentences and Clauses. Tables: R. 1.1(b)(ii) Citation clauses.
- 2An error: the rule in note 1 allows one form, and this is not it.