PAUL HANCOCK and BRIAN J. SKINNER. "Leakey, L. S. B." The Oxford Companion to the Earth. Oxford University Press. 2000. Encyclopedia.com. 14 Nov. 2009 <http://www.encyclopedia.com>.
PAUL HANCOCK and BRIAN J. SKINNER. "Leakey, L. S. B." The Oxford Companion to the Earth. Oxford University Press. 2000. Encyclopedia.com. (November 14, 2009). http://www.encyclopedia.com/doc/1O112-LeakeyLSB.html
PAUL HANCOCK and BRIAN J. SKINNER. "Leakey, L. S. B." The Oxford Companion to the Earth. Oxford University Press. 2000. Retrieved November 14, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O112-LeakeyLSB.html