Williams, C. C., & Padmore, J. (2013). "Envelope wages" in the European Union. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Williams, Colin C., e Jo Padmore. "Envelope Wages" in the European Union. International Labour Organization, 2013.
Citatione MLA (9a ed.)Williams, Colin C., e Jo Padmore. "Envelope Wages" in the European Union. International Labour Organization, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.