Duffy, A. (1936). The poetry of duty. National Council of Catholic Men.
Chicago Style (17th ed.) CitationDuffy, Alfred. The Poetry of Duty. Washington, D.C.: National Council of Catholic Men, 1936.
Cita MLADuffy, Alfred. The Poetry of Duty. National Council of Catholic Men, 1936.
Atenció: Aquestes cites poden no estar 100% correctes.