John Paul II, P. (1987). Unity in the work of service. National Conference of Catholic Bishops, United States Catholic Conferences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)John Paul II, Pope. Unity in the Work of Service. Washington, D.C.: National Conference of Catholic Bishops, United States Catholic Conferences, 1987.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)John Paul II, Pope. Unity in the Work of Service. National Conference of Catholic Bishops, United States Catholic Conferences, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.