Davis, I. C. (1961). Science: Discovery and progress. Holt.
Lua i Stíl Chicago (17ú heag.)Davis, Ira C. Science: Discovery and Progress. New York: Holt, 1961.
Lua MLA (8ú heag.)Davis, Ira C. Science: Discovery and Progress. Holt, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.