Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.