Stevens, John. One Robe One Bowi: The Zen Poetry of Ryokan. New York: Weatherhill, 1977.
Streng, Frederick J. Emptiness: A Study in Religious Meaning. Nashville: Abingdon, 1967.
Suzuki, Daisetz T. Essays in Zen Buddhism (First Series). London: Rider, 1949; paperback edition, New York: Grove,1961.
----- . Essays in Zen Buddhism (Second Series). London: Rider, 1953; paperback edition, New York: Weiser, 1971.
----- . Essays in Zen Buddhism (Third Series). London: Rider, 1953; paperback edition, New York: Weiser, 1971.
-----. The Lankavatara Sutra. London: Routledge & Kegan Paul, 1968.
----- . Manual of Zen Buddhism. New York: Grove, 1960.
----- . Sengai: The Zen Master. Greenwich, Conn.: New York Graphic Society, 1971.
----. Studies in the Lankavatara Sutra. London: Routledge & Kegan Paul, 1930.
----- . Zen and Japanese Culture. Princeton, N. J.: Princeton University Press, 1959.