"Harrison Ford, Liam Hemsworth, Amber Heard, Lucas Till, and Director Robert Luketic Talk PARANOIA, Real-Life Parallels, and More". Interview with Sheila Roberts, collider.com. August 12, 2013.
"The theory of the firm in the last ten Years" by Kenneth E. Boulding in "The American Economic Review", Volume 32, No. 4 (pp. 791-802), December 1942.
Michel de Montaigne (1850). “Works, Comprising His Essays, Letters, and Journey Through Germany and Italy: With Notes from All the Commentators, Biographical and Bibliographical Notices &c., &c”, p.94
James Boswell, Samuel Johnson (1824). “The Life of Samuel Johnson, LL. D., Comprehending an Account of His Studies, and Numerous Works, in Chronological Order: A Series of His Epistolary Correspondence and Conversations with Many Eminent Persons; and Various Original Pieces of His Composition, Never Before Published; the Whole Exhibiting a View of Literature and Literary Men in Great Britain, for Near Half a Century During which He Flourished”, p.78