Mallory, J. P., & Adams, D. Q. (2006). The Oxford introduction to Proto Indo European and the Proto Indo European world. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Mallory, J. P., agus Douglas Q. Adams. The Oxford Introduction to Proto Indo European and the Proto Indo European World. New York: Oxford University Press, 2006.
Lua MLA (9ú heag.)Mallory, J. P., agus Douglas Q. Adams. The Oxford Introduction to Proto Indo European and the Proto Indo European World. Oxford University Press, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.