Webb, R. H., & Betancourt, J. L. (1992). Climatic variability and flood frequency of the Santa Cruz River, Pima County, Arizona. Book and Open-File Report Sales, U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Webb, Robert H., und Julio L. Betancourt. Climatic Variability and Flood Frequency of the Santa Cruz River, Pima County, Arizona. Denver, Colo: Book and Open-File Report Sales, U.S. Geological Survey, 1992.
MLA-Zitierstil (9. Ausg.)Webb, Robert H., und Julio L. Betancourt. Climatic Variability and Flood Frequency of the Santa Cruz River, Pima County, Arizona. Book and Open-File Report Sales, U.S. Geological Survey, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.