Diamond, J. M. (2011). Collapse: How societies choose to fail or succeed. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Diamond, Jared M. Collapse: How Societies Choose to Fail or Succeed. New York: Penguin Books, 2011.
Lua MLA (9ú heag.)Diamond, Jared M. Collapse: How Societies Choose to Fail or Succeed. Penguin Books, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.