Crowe, F. E. (1968). A time of change: Guidelines for the perplexed Catholic. Bruce Pub. Co.
Lua i Stíl Chicago (17ú heag.)Crowe, Frederick E. A Time of Change: Guidelines for the Perplexed Catholic. Milwaukee: Bruce Pub. Co, 1968.
Lua MLA (8ú heag.)Crowe, Frederick E. A Time of Change: Guidelines for the Perplexed Catholic. Bruce Pub. Co, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.