Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (8e éd.)

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