Oxford Dictionary of Sports Science & Medicine. Eprint. (englanniksi)
archive.org
Katso ”hypothesis”, Century Dictionary Supplement, v. 1, 1909, New York: The Century Company. Reprinted, vsk. 11, s. 616 (Internet Archivessa) Century Dictionary and Cyclopedia, 1911. Lainaus: ”hypothesis [...]—Working hypothesis, a hypothesis suggested or supported in some measure by features of observed facts, from which consequences may be deduced which can be tested by experiment and special observations, and which it is proposed to subject to an extended course of such investigation, with the hope that, even should the hypothesis thus be overthrown, such research may lead to a tenable theory.” (englanniksi)
books.google.com
Hilborn, Ray & Mangel, Marc: The Ecological Detective. Confronting Models with Data, s. 24. Princeton University Press, 1997. ISBN 978-0-691-03497-3. Google Books (viitattu 22.8.2011). (englanniksi)
