Opal, J. M. (2008). Beyond the farm: National ambitions in rural New England. University of Pennsylvania Press.
芝加哥风格引文Opal, J. M. Beyond the Farm: National Ambitions in Rural New England. Philadelphia: University of Pennsylvania Press, 2008.
MLA引文Opal, J. M. Beyond the Farm: National Ambitions in Rural New England. University of Pennsylvania Press, 2008.
警告：这些引文格式不一定是100％准确.