Collins, B. D., Minasian, D., & Kayen, R. (2009). Topographic change detection at select archeological sites in Grand Canyon National Park, Arizona, 2006-2007. U.S. Geological Survey.
Chicago Style (17th ed.) CitationCollins, Brian David, Diane Minasian, and Robert Kayen. Topographic Change Detection at Select Archeological Sites in Grand Canyon National Park, Arizona, 2006-2007. Reston, Va.: U.S. Geological Survey, 2009.
MLA (9th ed.) CitationCollins, Brian David, et al. Topographic Change Detection at Select Archeological Sites in Grand Canyon National Park, Arizona, 2006-2007. U.S. Geological Survey, 2009.
Warning: These citations may not always be 100% accurate.