Axelrod, R. The evolution of cooperation. Basic books.
Lua i Stíl Chicago (17ú heag.)Axelrod, Robert. The Evolution of Cooperation. New York: Basic books.
Lua MLA (9ú heag.)Axelrod, Robert. The Evolution of Cooperation. Basic books.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.