Ryan, J. A. (1934). The Catholic teaching on our industrial system (2d ed.). National Council of Catholic Men.
Lua i Stíl Chicago (17ú heag.)Ryan, John A. The Catholic Teaching on Our Industrial System. 2d ed. Washington: National Council of Catholic Men, 1934.
Lua MLA (8ú heag.)Ryan, John A. The Catholic Teaching on Our Industrial System. 2d ed. National Council of Catholic Men, 1934.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.