Merton, T., & Shannon, W. H. (1995). Witness to freedom: The letters of Thomas Merton in times of crisis (1st Harvest ed.). Harcourt Brace.
Lua i Stíl Chicago (17ú heag.)Merton, Thomas, agus William Henry Shannon. Witness to Freedom: The Letters of Thomas Merton in Times of Crisis. 1st Harvest ed. San Diego, Calif.: Harcourt Brace, 1995.
Lua MLA (8ú heag.)Merton, Thomas, agus William Henry Shannon. Witness to Freedom: The Letters of Thomas Merton in Times of Crisis. 1st Harvest ed. Harcourt Brace, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.