Style de citation APA (7e éd.)

Sumner, W. G. (1952). What social classes owe to each other. Caxton Printers.

Style de citation Chicago (17e éd.)

Sumner, William Graham. What Social Classes Owe to Each Other. Caldwell, Idaho: Caxton Printers, 1952.

Style de citation MLA (8e éd.)

Sumner, William Graham. What Social Classes Owe to Each Other. Caxton Printers, 1952.