Cita APA (7th ed.)
Duff, E. Social Order: November 1959. The Institute of Social Order.
Cita Chicago (17th ed.)
Duff, Edward. Social Order: November 1959. Saint Louis, EUA: The Institute of Social Order.
Cita MLA (9th ed.)
Duff, Edward. Social Order: November 1959. The Institute of Social Order.
Atenció: Aquestes cites poden no estar 100% correctes.