Spencer, C. (1977). Blue collar: An internal examination of the workplace. Lakeside Charter Books.
Citazione stile Chigago Style (17a edizione)Spencer, Charles. Blue Collar: An Internal Examination of the Workplace. Chicago: Lakeside Charter Books, 1977.
Citatione MLA (8a ed.)Spencer, Charles. Blue Collar: An Internal Examination of the Workplace. Lakeside Charter Books, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.