Babcock, D. C. (1929). Man and social achievement: An introduction to social evolution. Longmans, Green and Co..
Chicago-viite (17. p.)Babcock, Donald Campbell. Man and Social Achievement: An Introduction to Social Evolution. New York, London [etc.]: Longmans, Green and Co., 1929.
MLA-viite (8. p.)Babcock, Donald Campbell. Man and Social Achievement: An Introduction to Social Evolution. Longmans, Green and Co., 1929.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.