Catholic Church. Pontifical Council for the Family & United States Catholic Conference. (1991). In the service of life: Instrumentum laboris. Office for Publishing and Promotion Services, United States Catholic Conference.
Chicago-referens (17:e uppl.)Catholic Church. Pontifical Council for the Family och United States Catholic Conference. In the Service of Life: Instrumentum Laboris. Washington, D.C.: Office for Publishing and Promotion Services, United States Catholic Conference, 1991.
MLA-referens (8:e uppl.)Catholic Church. Pontifical Council for the Family och United States Catholic Conference. In the Service of Life: Instrumentum Laboris. Office for Publishing and Promotion Services, United States Catholic Conference, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.