Hallgrimsdottir & Benoit 2007. Hallgrimsdottir, Helga Kristin; Benoit, Cecilia (2007). “From Wage Slaves to Wage Workers: Cultural Opportunity Structures and the Evolution of the Wage Demands of the Knights of Labor and the American Federation of Labor, 1880–1900”. 《Social Forces》 85 (3): 1393–411. doi:10.1353/sof.2007.0037. JSTOR4494978.
Hallgrimsdottir & Benoit 2007. Hallgrimsdottir, Helga Kristin; Benoit, Cecilia (2007). “From Wage Slaves to Wage Workers: Cultural Opportunity Structures and the Evolution of the Wage Demands of the Knights of Labor and the American Federation of Labor, 1880–1900”. 《Social Forces》 85 (3): 1393–411. doi:10.1353/sof.2007.0037. JSTOR4494978.