Use the publisher in the parenthetical

Warning²Federal courts, Illinois courts21st and 22nd editions

A database standing where the publisher belongs names the source the text was read on, not the house that compiled the code; the publisher comes first.¹

1. 1R. 12.5(a) Commercial electronic databases; R. 12.3.1(d) Publisher, editor, or compiler. Tables: T1.3 States and the District of Columbia.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.