Cita APA (7a ed.)
Duff, E. Social Order: November 1961. The Institute of Social Order.
Cita estilo Chicago (17a ed.)
Duff, Edward. Social Order: November 1961. Saint Louis, EUA: The Institute of Social Order.
Cita MLA (9a ed.)
Duff, Edward. Social Order: November 1961. The Institute of Social Order.
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