APA (7th ed.) Citation

Merton, T., Shannon, W. H., & Bochen, C. M. (2008). Thomas Merton, a life in letters: The essential collection. HarperOne.

Chicago Style (17th ed.) Citation

Merton, Thomas, William H. Shannon, and Christine M. Bochen. Thomas Merton, a Life in Letters: The Essential Collection. New York: HarperOne, 2008.

MLA (8th ed.) Citation

Merton, Thomas, et al. Thomas Merton, a Life in Letters: The Essential Collection. HarperOne, 2008.