Roberts, B. C. (1959). Unions in America: A British view. Industrial Relations Section, Princeton.
Citazione stile Chigago Style (17a edizione)Roberts, Benjamin Charles. Unions in America: A British View. Princeton, N.J: Industrial Relations Section, Princeton, 1959.
Citatione MLA (9a ed.)Roberts, Benjamin Charles. Unions in America: A British View. Industrial Relations Section, Princeton, 1959.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.