Brown, J. A., & Brues, A. M. (1996). The Spiro Ceremonial Center: The archaeology of Arkansas Valley Caddoan culture in Eastern Oklahoma. Museum of Anthropology, University of Michigan.
Chicago-referens (17:e uppl.)Brown, James Allison, och Alice Mossie Brues. The Spiro Ceremonial Center: The Archaeology of Arkansas Valley Caddoan Culture in Eastern Oklahoma. Ann Arbor, Mich: Museum of Anthropology, University of Michigan, 1996.
MLA-referens (9:e uppl.)Brown, James Allison, och Alice Mossie Brues. The Spiro Ceremonial Center: The Archaeology of Arkansas Valley Caddoan Culture in Eastern Oklahoma. Museum of Anthropology, University of Michigan, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.