एपीए उद्धरण

Timilsena, J., Piechota, T. C., Hidalgo León, H. G., & Tootle, G. (2007). Five Hundred Years of Hydrological Drought in the Upper Colorado River Basin.

शिकागो स्टाइल उद्धरण

Timilsena, Janak, Thomas C. Piechota, Hugo G. Hidalgo León, और Glenn Tootle. Five Hundred Years of Hydrological Drought in the Upper Colorado River Basin. 2007.

एमएलए उद्धरण

Timilsena, Janak, Thomas C. Piechota, Hugo G. Hidalgo León, और Glenn Tootle. Five Hundred Years of Hydrological Drought in the Upper Colorado River Basin. 2007.