Παραπομπή APA
Hobson, J. A. (1969). The industrial system: An inquiry into earned and unearned income [1909]. New York: Augustus M. Kelley.
Παραπομπή Chicago StyleHobson, John Atkinson. The Industrial System: An Inquiry Into Earned and Unearned Income [1909]. New York: Augustus M. Kelley, 1969.
Παραπομπή MLAHobson, John Atkinson. The Industrial System: An Inquiry Into Earned and Unearned Income [1909]. New York: Augustus M. Kelley, 1969.
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