Lua APA (7ú heag.)
Gay, C. T. E. (1972). Xochipala: The beginnings of Olmec art. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)
Gay, Carlo T. E. Xochipala: The Beginnings of Olmec Art. Princeton, New Jersey: Princeton University Press, 1972.
Lua MLA (9ú heag.)
Gay, Carlo T. E. Xochipala: The Beginnings of Olmec Art. Princeton University Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.