Timilsena, J., Piechota, T. C., Hidalgo León, H. G., & Tootle, G. (2007). Five Hundred Years of Hydrological Drought in the Upper Colorado River Basin.
استشهاد بنمط شيكاغوTimilsena, Janak, Thomas C. Piechota, Hugo G. Hidalgo León, و Glenn Tootle. Five Hundred Years of Hydrological Drought in the Upper Colorado River Basin. 2007.
MLA استشهادTimilsena, Janak, Thomas C. Piechota, Hugo G. Hidalgo León, و Glenn Tootle. Five Hundred Years of Hydrological Drought in the Upper Colorado River Basin. 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.