Boyer, D. E., & Webb, R. H. (2007). Damming Grand Canyon: The 1923 USGS Colorado River expedition. Utah State University Press.
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Dyfyniad Arddull Chicago
Boyer, Diane E., and Robert H. Webb. Damming Grand Canyon: The 1923 USGS Colorado River Expedition. Logan, Utah: Utah State University Press, 2007.
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Dyfyniad MLA
Boyer, Diane E., and Robert H. Webb. Damming Grand Canyon: The 1923 USGS Colorado River Expedition. Utah State University Press, 2007.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.