Beard, C. A. 1. c., & Shultz, B. E. (1912). Documents on the state-wide initiative, referendum and recall. The Macmillan company.
Lua i Stíl Chicago (17ú heag.)Beard, Charles Austin 1874- comp, agus Birl Earl Shultz. Documents on the State-wide Initiative, Referendum and Recall. New York: The Macmillan company, 1912.
Lua MLA (9ú heag.)Beard, Charles Austin 1874- comp, agus Birl Earl Shultz. Documents on the State-wide Initiative, Referendum and Recall. The Macmillan company, 1912.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.