Use a short form

Style note²Federal courts, Illinois courts21st and 22nd editions

Once a book has been cited in full, a later reference to it uses “id.” or “supra” rather than repeating the whole citation.¹

1. 1B15.2 Short Form Citation. Tables: R. 15.10 Short Citation Forms.
2. 2A style note: the rule in note 1 allows both forms and prefers one.