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. United States Catholic Conference.
Παραπομπή σε μορφή Chicago (17η εκδ.)Villot, Jean, και 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.
Παραπομπή σε μορφή MLA (8th εκδ.)Villot, Jean, και 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. United States Catholic Conference, 1978.