Falkner, Morgan. “McNeill, William H., Jerry H. Bentley, David Christian, David Levinson, J.R. McNeill, Heidi Roupp, and Judith P. Zinsser, Eds. Berkshire Encyclopedia of World History”. World History Connected, vol. 3, no. 2, Feb. 2006, doi:10.13021/whc.v3i2.5100.