Johnston, R. D. (2006). The radical middle class: Populist democracy and the question of capitalism in progressive era Portland, Oregon. Princeton University Press.
芝加哥风格引文Johnston, Robert D. The Radical Middle Class: Populist Democracy and the Question of Capitalism in Progressive Era Portland, Oregon. Princeton, New Jersey ; Oxfordshire, England: Princeton University Press, 2006.
MLA引文Johnston, Robert D. The Radical Middle Class: Populist Democracy and the Question of Capitalism in Progressive Era Portland, Oregon. Princeton University Press, 2006.
警告：这些引文格式不一定是100％准确.