Farzan, Massud. "Whitman and Sufism: Towards 'A Persian Lesson.'" American Literature. 47 (1976): 572-582.
Fayez, Ghulam M. “Motion Imagery in Rumi and Whitman.” Walt Whitman Review, 25.2 (June 1979). 39-51.
---. “Image of the Devine in Rumi and Whitman.” Comparative literature Studies, 17. 1 (1980): 33-43.
Fomeshi, Behnam M. “Walt Whitman's and Nima Yushij's Literary Innovations: A Study in Comparative Poetics.” Ph.D. Dissertation, Shiraz: Shiraz University (Iran), 2015.
---. "Sohrab Sepehri," The Literary Encyclopedia, 7 March 2018. http://www.litencyc.com/php/speople.php?rec=true&UID=14018, accessed 7 March 2018.
Ford, Arthur L. "The Rose-Garden of the World: Near East Imagery in the Poetry of Walt Whitman." Walt Whitman Quarterly Review, 5 (1987), 12-20.
Frabizio, Ryan. “The Ecstatic Whitman: The Body and Sufistic Influences in Leaves of Grass.” M.A. Thesis. Boca Raton: Florida Atlantic University, 2012.
Furlanetto, Elena. “Walt Whitman’s ‘Sea Drift’ Cluster: The Encounter of Sufi and American Selves at Paumanok.” Ed. Donatella Izzo. Harbors, Flows, and Migrations: The USA in/and the World. Newcastle Upon Tyne: Cambridge Scholars, 2017. 95-110.
Hoffman-Ladd, Valerie J. “Mysticism and Sexuality in Sufi Thought and Life.” Mystics Quarterly, 18.3 (1992), 82-93.
Karimi-Hakkak, Ahmad. Recasting Persian Poetry: Scenarios of Poetic Modernity in Iran. Salt Lake City: University of Utah Press, 1995.
Kennedy, William Sloane. The Fight of a Book for the World. West Yarmouth: The Stonecraft Press, 1926.
Khosla, Krish. The Sufism of Rumi. Dorset: Element Books, 1987.
Lemaster, J. R. and Sabahat Jahan. Walt Whitman and the Persian Poets: A Study in Literature and Religion. Bethesda, Md.: Ibex Publishers, 2009.
Losensky, Paul. “Persian Poetry.” The Princeton Encyclopedia of Poetry and Poetics. Eds. Stephen Cushman et al. 4th edition. Princeton, NJ: Princeton University Press, 2012. 1021–1024.
Traubel, Horace. With Walt Whitman in Camden. Vol. 3. New York: Rowman and Littlefield, 1961.
Whitman, Walt. Walt Whitman: Complete Poetry and Collected Prose. Ed. Justin Kaplan. New York: Penguin, 1982.
Whitman Gallery <<http://whitmanarchive.org/archive1/photos/1850s/docs/005.html>>. Accessed on 10 January 2018.