Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Zitierstil

Willey, G. R. 1., & Shimkin, D. B. (1971). Why did the pre-columbian Maya civilization collapse? - Washington, D.C. Symposium held in Santa Fe, NM 19-24 Oct. 1970.

Chicago Zitierstil

Willey, Gordon R. 1913-2002., and Demitri B. Shimkin. Why Did the Pre-columbian Maya Civilization Collapse? - Washington, D.C. Symposium Held in Santa Fe, NM 19-24 Oct. 1970. 1971.

MLA Zitierstil

Willey, Gordon R. 1913-2002., and Demitri B. Shimkin. Why Did the Pre-columbian Maya Civilization Collapse? - Washington, D.C. Symposium Held in Santa Fe, NM 19-24 Oct. 1970. 1971.