- A History of California Initiatives [December 2002]
- This historical study of initiatives from the year 1912 through December 2002 offers a concise history of initiatives and the initiative process.
- California Ballot Measures Database [U.C. Hastings College of the Law]
- A comprehensive, searchable source of information on California ballot propositions from 1911 to the present. The database contains the full text of the propositions, accompanying material contained in the ballot pamphlets, related legal and legislative history, and digital images of the ballot pamphlets.