Barks, Coleman, and Moyne, John. This Longing: Poetry, Teaching Stories, and Letters of Rumi  by Jelaluddin Rumi. Boston, MA; Shambhala Publications, 1988.

Bachelard, Gaston. The Poetics of Space. Boston, MA: Beacon Press. 1958, 1994. 

Khan, Inayat and Barks, Coleman. The Hand of Poetry: Five Mystic Poets of Persia : Translations from the Poems of Sanai, Attar, Rumi, Saadi and Hafiz : Lectures on Persian Poetry.

Oliver, Mary. New and Selected Poems. Boston, MA: Beacon Press, 1992.

Rumi, Jallaudin, translation Coleman Barks. Open Secret. Boston, MA; Shambhala Publications, 1984.