"The Life of St. Teresa of Jesus, of The Order of Our Lady of Carmel" by Teresa of Avila, translated by David Lewis, (Ch. XXV. "Divine Locutions. Discussions on That Subject"), 1904.
"Interior Castle" by Teresa of Avila, (Ch. 2), as translated by the Benedictines of Stanbrook (1911), revised and edited by Fr. Benedict Zimmerman, 1577.