Langston Hughes, Dolan Hubbard, Leslie Catherine Sanders (2001). “The Collected Works of Langston Hughes: Works for children and young adults: poetry, fiction, and other writing”, p.81, University of Missouri Press
Mary C. Neal, M.D. (2012). “To Heaven and Back: A Doctor's Extraordinary Account of Her Death, Heaven, Angels, and Life Again: A True Story”, p.93, WaterBrook
Oral history interview with Sevim Fesci in New Haven, Connecticut, for the "Archives of American Art," Smithsonian Institution, www.aaa.si.edu. June 22, 1968.
John Muir (2015). “John Muir: The Story of My Boyhood and Youth & Letters to a Friend (Autobiography With Original Drawings): The Memoirs of the Naturalist, Environmental Philosopher and Early Advocate of Preservation of Wilderness, the Author of The Yosemite, Travels in Alaska, The Mountains of California & Steep Trails”, p.129, e-artnow