APA-ийн эшлэл(7 дахь хэвлэлт)

Johnston, R. D. (2006). The radical middle class: Populist democracy and the question of capitalism in progressive era Portland, Oregon. Princeton University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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 -ийн эшлэл (9 дэх хэвлэлт)

Johnston, Robert D. The Radical Middle Class: Populist Democracy and the Question of Capitalism in Progressive Era Portland, Oregon. Princeton University Press, 2006.