Mosby's Medical, Nursing, and Allied Health Dictionary (ed. 3rd), St. Louis, Missouri: The C.V. Mosby Co., 1990, m/s. 957, ISBN0-8016-3227-7Unknown parameter |editors= ignored (bantuan)
Christopher Dean (1994). "Jaws and teeth". The Cambridge Encyclopedia of Human Evolution. Cambridge: Cambridge University Press. m/s. 56–59. ISBN0-521-32370-3. Unknown parameter |editors= ignored (bantuan) Also ISBN 0-521-46786-1 (paperback)