Cita APA (7a ed.)
Duff, E. Social Order: October 1960. The Institute of Social Order.
Cita estilo Chicago (17a ed.)
Duff, Edward. Social Order: October 1960. Saint Louis, EUA: The Institute of Social Order.
Cita MLA (9a ed.)
Duff, Edward. Social Order: October 1960. The Institute of Social Order.
Precaución: Estas citas no son 100% exactas.