Use a short form

Style note²Federal courts, Illinois courts21st and 22nd editions

Once an article has been cited in full, later references to it use “id.” or the author's surname with “supra” rather than the whole citation again.¹

1. 1R. 16.9 Short Citation Forms; B16.2 Short Form Citation. Tables: R. 4.1 “Id.”; R. 4.2(a) “Supra.”.
2. 2A style note: the rule in note 1 allows both forms and prefers one.