Butler, C., & Knowles, D. (1967). Western mysticism: The teaching of Augustine, Gregory and Bernard on contemplation and the contemplative life (Third edition.). Constable.
Cita Chicago Style (17a ed.)Butler, Cuthbert, y David Knowles. Western Mysticism: The Teaching of Augustine, Gregory and Bernard on Contemplation and the Contemplative Life. Third edition. London: Constable, 1967.
Cita MLA (9a ed.)Butler, Cuthbert, y David Knowles. Western Mysticism: The Teaching of Augustine, Gregory and Bernard on Contemplation and the Contemplative Life. Third edition. Constable, 1967.
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