Savage, J. M. (1963). Evolution. Holt, Rinehart adn Winston.
Lua i Stíl Chicago (17ú heag.)Savage, Jay M. Evolution. Holt, Rinehart adn Winston, 1963.
Lua MLA (8ú heag.)Savage, Jay M. Evolution. Holt, Rinehart adn Winston, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.