Saya mau tau , pp. 64, 75-76. dari Agama Olmek

(1957) Indian Art of Mexico and Central America, New York: Alfred A. Knopf.

(1996) "In Search of the Olmec Cosmos: Reconstructing the World View of Mexico's First Civilization". In E. P. Benson and B. de la Fuente (eds.), Olmec Art of Ancient Mexico. Washington, D.C.: National Gallery of Art: 51-60. .

(1976) Olmec Religion: A Key to Middle America and Beyond. University of Oklahoma Press, Norman, Oklahoma. .

(1996) "Portable Carvings in the Olmec Style", in E. P. Benson and B. de la Fuente (eds.), Olmec Art of Ancient Mexico. Washington, D.C.: National Gallery of Art: 119-131. .