Dyfyniad APA
Stettler, R. F. (2009). Cottonwood and the river of time: On trees, evolution, and society. University of Washington Press.
Dyfyniad Arddull Chicago
Stettler, R. F. Cottonwood and the River of Time: On Trees, Evolution, and Society. Seattle: University of Washington Press, 2009.
Dyfyniad MLA
Stettler, R. F. Cottonwood and the River of Time: On Trees, Evolution, and Society. University of Washington Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.