Folkways : a study of the sociological importance of usages, manners, customs, mores,
and morals / by William Graham Sumner ; with a special introd. by William Lyon Phelps,
1906
Information trouvée : professeur de sciences politiques et sociales, Yale University, New Haven, Connecticut,
USA
LCNA : 1993-03, Sumner, William Graham, 1840-1910