1921
Harding, William G. "Inaugural Address." 4 Mar. 1921, East Portico, US Capitol Building, Washington, DC, USA.
Wodehouse, P. G. The Adventures of Sally. Herbert Jenkins, 1922. Originally published in Collier's Magazine, 8 Oct. 1921-31 Dec. 1921.
Service, Robert W. "Michael." Ballads of a Bohemian. Barse & Hopkins/T. Fisher Unwin, 1921, I. 31.
Jung, Carl. Psychologische Typen [Psychological Types]. Rascher Verlag, 1921.
Jung, Carl. Psychological Types, edited by R. F. C. Hull, translated by H. G. Baynes. Princeton University Press, 1976.
Maran, Rene. Batouala. Albin Michel, 1921, ch. 1.
Maran, Rene. Batouala, translated by Adele Szold Seltzer. Heinemann, 1988, ch. 1.
Mencken, H. L. "Repetition Generale." Smart Set, Mar. 1921.
Neurath, Otto. Anti-Spengler. G.D.W. Callwey, 1921.
Neurath, Otto. Quoted in Otto Neurath: Philosophy Between Science and Politics, written by Nancy Cartwright, Jordi Cat, Lola Fleck and Thomas E. Uebel. Cambridge University Press, 2008.
Sapir, Edward. Language: An Introduction to the Study of Speech. Harcourt, Brace and Company, 1921, ch. 2.
Chekhov, Anton. Diary entry. c. 1885.
Chekhov, Anton. The Notebooks of Anton Chekhov and Reminiscences of Chekhov, translated by S. S. Koteliansky and Leonard Woolf. University Press of the Pacific, 2002.
Harding, William G. "Inaugural Address." 4 Mar. 1921, East Portico, US Capitol Building, Washington, DC, USA.