Cita APA (7a ed.)

Duffy, A. (1936). The poetry of duty. National Council of Catholic Men.

Cita Chicago Style (17a ed.)

Duffy, Alfred. The Poetry of Duty. Washington, D.C.: National Council of Catholic Men, 1936.

Cita MLA (8a ed.)

Duffy, Alfred. The Poetry of Duty. National Council of Catholic Men, 1936.