Yetman, D., & Shaul, D. L. (2010). The Opatas: In search of a Sonoran people. University of Arizona Press.

Yetman, David, and David Leedom Shaul. The Opatas: In Search of a Sonoran People. Tucson: University of Arizona Press, 2010.

Yetman, David, and David Leedom Shaul. The Opatas: In Search of a Sonoran People. University of Arizona Press, 2010.