Leopold Stokowski's statement recalled in obituaries (September 13, 1977), as quoted in "Simpson's Contemporary Quotations" compiled by James B. Simpson, 1988.
John Ruskin, Louisa Caroline Tuthill (1872). “The True and the Beautiful in Nature, Art, Morals, and Religion, Selected from the Works of John Ruskin”, p.242
"Kevin Costner Talks DRAFT DAY, His Career, What We Can Learn from the Movies, How GIANT Influenced His Outlook on Life, and More". Interview with Sheila Roberts, collider.com. April 7, 2014.