APA (7th ed.) Citation

Richards, J. F. (2003). The unending frontier: An environmental history of the early modern world. University of California Press.

Chicago Style (17th ed.) Citation

Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World. Berkeley: University of California Press, 2003.

MLA (9th ed.) Citation

Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World. University of California Press, 2003.