Sir William Osler, Mark E. Silverman, T. J. Murray, Charles S. Bryan, American College of Physicians--American Society of Internal Medicine (2003). “The Quotable Osler”, p.38, ACP Press
Howard Kissel, Stella Adler (2000). “Stella Adler - The Art of Acting: preface by Marlon Brando compiled & edited by Howard Kissel”, p.12, Hal Leonard Corporation
John Muir (2015). “John Muir’s Incredible Travel Memoirs: A Thousand-Mile Walk to the Gulf, My First Summer in the Sierra, The Mountains of California, Travels in Alaska, Steep Trails… (Illustrated): Adventure Memoirs & Wilderness Studies from the Naturalist, Environmental Philosopher and Early Advocate of Preservation of Wilderness, the Author of The Yosemite and Picturesque California”, p.14, e-artnow