Gulick, L. H. (1962). The metropolitan problem and american ideas: Five lectures delivered on the William W. Cook Foundation at the University of Michigan, March 6-10, 1961. New York: Alfred A. Knopf.
Παραπομπή Chicago StyleGulick, Luther Halsey. The Metropolitan Problem and American Ideas: Five Lectures Delivered On the William W. Cook Foundation At the University of Michigan, March 6-10, 1961. New York: Alfred A. Knopf, 1962.
Παραπομπή MLAGulick, Luther Halsey. The Metropolitan Problem and American Ideas: Five Lectures Delivered On the William W. Cook Foundation At the University of Michigan, March 6-10, 1961. New York: Alfred A. Knopf, 1962.
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