Johnson, W. H. (1962). This is life: Essays in modern biology. Holt, Rinehart and Winston.
Lua i Stíl Chicago (17ú heag.)Johnson, Willis H. This Is Life: Essays in Modern Biology. New York: Holt, Rinehart and Winston, 1962.
Lua MLA (9ú heag.)Johnson, Willis H. This Is Life: Essays in Modern Biology. Holt, Rinehart and Winston, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.