Merton, T., & Hanh, T. N. (1989). Contemplative prayer. Image Books.
Chicago Style (17th ed.) CitationMerton, Thomas, and Thich Nhat Hanh. Contemplative Prayer. New York [etc.]: Image Books, 1989.
MLA (9th ed.) CitationMerton, Thomas, and Thich Nhat Hanh. Contemplative Prayer. Image Books, 1989.
Warning: These citations may not always be 100% accurate.