Pius XI, P., & Loeffler, J. D. (1938). Directives for Catholic action: Expounded by Pope Pius XI ; with indulgences for those enrolled in Catholic action. Central Bureau Press.
Lua i Stíl Chicago (17ú heag.)Pius XI, Pope, agus James D. Loeffler. Directives for Catholic Action: Expounded by Pope Pius XI ; with Indulgences for Those Enrolled in Catholic Action. St. Louis, Mo.: Central Bureau Press, 1938.
Lua MLA (8ú heag.)Pius XI, Pope, agus James D. Loeffler. Directives for Catholic Action: Expounded by Pope Pius XI ; with Indulgences for Those Enrolled in Catholic Action. Central Bureau Press, 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.