Villot, J., & Cooke, T. (1978). Letter of Jean Cardinal Villot and Address of Terence Cardinal Cooke: On the occasion of a Symposium on Natural Family Planning, Ten Years of Progress, 1968-1978.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Villot, Jean, و Terence Cooke. Letter of Jean Cardinal Villot and Address of Terence Cardinal Cooke: On the Occasion of a Symposium on Natural Family Planning, Ten Years of Progress, 1968-1978. Washington, D.C. : United States Catholic Conference, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Villot, Jean, و Terence Cooke. Letter of Jean Cardinal Villot and Address of Terence Cardinal Cooke: On the Occasion of a Symposium on Natural Family Planning, Ten Years of Progress, 1968-1978. 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.