The American Association of Law Libraries' Online Legal Information Resources notes the official status of each state's primary law publications found on government websites, including statutes.
The National Conference of State Legislatures published a list of official state code publications, and their available formats, based upon a 2011 survey of Official Version of the State Statutes/Code.
In Westlaw, search also state legislative history, statutes annotated - historical, bill tracking, bill tracking historical, and proposed & enacted legislation.
In Bloomberg Law, text of enacted legislation may be found through State Laws & Regulations.
LLMC Digital may contain digitized historical senate and house journals as well as historical state statutes and/or session laws (Online Services > Browse Collections > U.S. States and Territories > State Name > Legislative).
State Legislative Sourcebook (in print, Call Number: Reference Desk JK2495 .S689), though ceased in 2021, is a 50-state guide on legislative information resources. In addition to providing the location of a state's legislative documents, it also includes sources for tracking services, document mailing services and best live person initial contact.
For current state constitution developments: State Court Reports.
For provision-by-provision commentary on the state's constitution with analysis of the state's current constitution and its evolution: Oxford Commentaries on the State Constitutions of the United States. Editions held by the Law Library will be found in the catalog, including those published under a former series title.