Dyfyniad APA
Richards, J. F. (2003). The unending frontier: An environmental history of the early modern world by. University of California Press.
Dyfyniad Arddull Chicago
Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World by. Berkeley: University of California Press, 2003.
Dyfyniad MLA
Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World by. University of California Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.