Mallory, J. P., & Adams, D. Q. (2006). The Oxford introduction to Proto Indo European and the Proto Indo European world. Oxford University Press.

Mallory, J. P., and Douglas Q. Adams. The Oxford Introduction to Proto Indo European and the Proto Indo European World. New York: Oxford University Press, 2006.

Mallory, J. P., and Douglas Q. Adams. The Oxford Introduction to Proto Indo European and the Proto Indo European World. Oxford University Press, 2006.