Cashen, R. A. (1981). Solitude in the thought of Thomas Merton. Cistercian Publications.
Lua i Stíl Chicago (17ú heag.)Cashen, Richard Anthony. Solitude in the Thought of Thomas Merton. Kalamazoo, Mich.: Cistercian Publications, 1981.
Lua MLA (8ú heag.)Cashen, Richard Anthony. Solitude in the Thought of Thomas Merton. Cistercian Publications, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.