Add the bracketed abbreviation

Warning²Federal courts, Illinois courts21st and 22nd editions

A citation to an intergovernmental organization’s document opens with the organization’s full name and its acronym in square brackets, which defines the short form used later.¹

1. 1R. 21.13 Other Intergovernmental Organizations. Tables: T3.9 Intergovernmental Organizations.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.