Babcock, D. C. (1929). Man and social achievement: An introduction to social evolution. Longmans, Green and Co..
Lua i Stíl Chicago (17ú heag.)Babcock, Donald Campbell. Man and Social Achievement: An Introduction to Social Evolution. New York, London [etc.]: Longmans, Green and Co., 1929.
Lua MLA (8ú heag.)Babcock, Donald Campbell. Man and Social Achievement: An Introduction to Social Evolution. Longmans, Green and Co., 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.