Darwin, C. Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters.
Lua i Stíl Chicago (17ú heag.)Darwin, Charles. Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters.
Lua MLA (9ú heag.)Darwin, Charles. Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.