Niels Bohr's response to questions on the nature of language during his first meeting with Werner Heisenberg (Summer 1920), as quoted in "Discussions about Language", 1933, in Robert J. Pranger "Defense Implications of International Indeterminacy" (p. 11), 1972, and in Steve Giles "Theorizing Modernism: Essays in Critical Theory" (p. 28), 1993.
Richard Chenevix Trench (1867). “On the Study of Words Lectures Addressed (originally) to the Pupils at the Diocesan Training-school, Winchester by Richard Chenevix Trench”, p.24
Edward Sapir, David Goodman Mandelbaum (1985). “Selected Writings of Edward Sapir in Language, Culture and Personality”, p.162, Univ of California Press
Edward Sapir, David Goodman Mandelbaum (1985). “Selected Writings of Edward Sapir in Language, Culture and Personality”, p.162, Univ of California Press