Spencer, C. (1977). Blue collar: An internal examination of the workplace. Lakeside Charter Books.
Citace podle Chicago (17th ed.)Spencer, Charles. Blue Collar: An Internal Examination of the Workplace. Chicago: Lakeside Charter Books, 1977.
Citace podle MLA (8th ed.)Spencer, Charles. Blue Collar: An Internal Examination of the Workplace. Lakeside Charter Books, 1977.
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