APA (7th ed.) Citation

Richards, J. F. (2005). The unending frontier: An environmental history of the early modern world (First paperback printing.). University of California Press.

Chicago Style (17th ed.) Citation

Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World. First paperback printing. Berkeley ; Los Angeles ; London: University of California Press, 2005.

MLA (9th ed.) Citation

Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World. First paperback printing. University of California Press, 2005.