APA (7th ed.) Citation

Wijayratne, U. C., & Pyke, D. A. (2009). Investigating seed longevity of big sagebrush (Artemisia tridentata). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Wijayratne, Upekala C., and David A. Pyke. Investigating Seed Longevity of Big Sagebrush (Artemisia Tridentata). Reston, Va.: U.S. Geological Survey, 2009.

MLA (9th ed.) Citation

Wijayratne, Upekala C., and David A. Pyke. Investigating Seed Longevity of Big Sagebrush (Artemisia Tridentata). U.S. Geological Survey, 2009.