^Random House Webster's Unabridged Dictionary (2nd ed.). New York: Random House. 2004. p. 1560. ISBN978-0-375-42599-8. Retrieved 11 December 2015. psycho-, a combining form representing psyche in compound words. … (Gk, comb. form of psyche breath, spirit, soul, mind; akin to psychein to blow).
^McKean, Erin (2005). The New Oxford American Dictionary (2nd ed.). Oxford: Oxford University Press. p. 1367. ISBN978-0-19-517077-1. psycho. comb. form relating to the mind or psychology: . . . from Greek psukhē breath, soul, mind.
^Girden, Edward (1962). "A review of psychokinesis (PK)". Psychological Bulletin. 59 (5): 353–388. doi:10.1037/h0048209. PMID13898904.
^Kurtz, Paul (1985). A Skeptic's Handbook of Parapsychology. Buffalo, New York: Prometheus Books. pp. 129–146. ISBN978-0-87975-300-9.
^Humphrey, Nicholas K. (1995). Soul Searching: Human Nature and Supernatural Belief. Chatto & Windus. pp. 160–217. ISBN978-0-7011-5963-4.
^Bunge, Mario (1983). Treatise on Basic Philosophy: Volume 6: Epistemology & Methodology II: Understanding the World. Springer. p. 226. "Despite being several thousand years old, and having attracted a large number of researchers over the past hundred years, we owe no single firm finding to parapsychology: no hard data on telepathy, clairvoyance, precognition, or psychokinesis."
^Sternberg, Robert J.; Roediger III, Henry J.; Halpern, Diane F. (2007). Critical Thinking in Psychology (1st ed.). Cambridge: Cambridge University Press. pp. 216–231. ISBN978-0-521-60834-3. Retrieved 11 December 2015.