Use the unpublished citation form

Warning²Federal courts, Illinois courts21st and 22nd editions

An unpublished source carries parentheticals saying it is unpublished and where to find it; a forthcoming work takes no page, and a working paper its number and year.¹

1. 1R. 17.1 Basic Citation Forms; R. 17.2 Unpublished Materials; R. 17.3 Forthcoming Publications; R. 17.4 Working Papers; R. 17.2.1 Manuscripts; R. 17.2.2 Dissertations and Theses. Tables: R. 17.5 Electronic Databases and Online Sources.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.