(2000). Oregon Intellectual Freedom Clearinghouse. Thirteenth Annual Report, July 1, 1999-June 30, 2000.
Citazione stile Chigago Style (17a edizione)Oregon Intellectual Freedom Clearinghouse. Thirteenth Annual Report, July 1, 1999-June 30, 2000. 2000.
Citatione MLA (9a ed.)Oregon Intellectual Freedom Clearinghouse. Thirteenth Annual Report, July 1, 1999-June 30, 2000. 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.