Use the service citation form

Error²Federal courts, Illinois courts21st and 22nd editions

A looseleaf or topical service is cited by its volume, its title in the form T15 prints, the publisher in parentheses, the subdivision, and the date, in that order.¹

1. 1R. 19.1 Citation Form for Services; B19 Services. Tables: T15 Services.
2. 2An error: the rule in note 1 allows one form, and this is not it.