Citing Unpublished Cases

Some courts allow citation to unpublished cases.  Other courts could discipline you for doing so.  How to keep this all straight?  One way is to refer to a Boston College Law Library list of state court rules for citing to unpublished cases:

http://www.aallnet.org/sections/rips/pdfs/17th-Legal-Research-Teach-In/bredastatecourtopinions.pdf