Lua APA (7ú heag.)
Wolf, C. (2008). Looking backward and forward: Policy issues in the twenty-first century. Hoover Institution Press.
Lua i Stíl Chicago (17ú heag.)
Wolf, Charles. Looking Backward and Forward: Policy Issues in the Twenty-first Century. Stanford, Calif.: Hoover Institution Press, 2008.
Lua MLA (9ú heag.)
Wolf, Charles. Looking Backward and Forward: Policy Issues in the Twenty-first Century. Hoover Institution Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.