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.
Lua i Stíl Chicago (17ú heag.)Villot, Jean, agus 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.
Lua MLA (8ú heag.)Villot, Jean, agus 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.