Cole, G. D. H. (1938). Socialism in Evolution. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Cole, G. D. H. Socialism in Evolution. Harmondsworth [u.a.]: Penguin Books, 1938.
Lua MLA (8ú heag.)Cole, G. D. H. Socialism in Evolution. Penguin Books, 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.