एपीए उद्धरण

Leo XIII, P. The condition of labor. Washington: National Catholic Welfare Conference.

शिकागो स्टाइल उद्धरण

Leo XIII, Pope. The Condition of Labor. Washington: National Catholic Welfare Conference.

एमएलए उद्धरण

Leo XIII, Pope. The Condition of Labor. Washington: National Catholic Welfare Conference.