Illinois. State Library. Springfield. (1948). Illinois State Library: A story of service.
Cita Chicago (17th ed.)Illinois. State Library. Springfield. Illinois State Library: A Story of Service. [Springfield], 1948.
Cita MLA (9th ed.)Illinois. State Library. Springfield. Illinois State Library: A Story of Service. 1948.
Atenció: Aquestes cites poden no estar 100% correctes.