APA引文
Richards, J. F. (2003). The unending frontier: An environmental history of the early modern world by. University of California Press.
Chicago Style (17th ed.) Citation
Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World by. Berkeley: University of California Press, 2003.
MLA引文
Richards, John F. The Unending Frontier: An Environmental History of the Early Modern World by. University of California Press, 2003.
警告：這些引文格式不一定是100％准確.