Charles Horton Cooley, Social Organization: A Study of the Larger Mind (New York: Charles Scribner's Sons, 1909), 25-31. 存档副本. [2007-02-14]. (原始内容存档于2007-02-14).
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Charles Horton Cooley, Social Organization: A Study of the Larger Mind (New York: Charles Scribner's Sons, 1909), 25-31. 存档副本. [2007-02-14]. (原始内容存档于2007-02-14).