Pollard, S. (1990). Wealth and poverty: An economic history of the twentieth century. Oxford University Press.
Chicago-referens (17:e uppl.)Pollard, Sidney. Wealth and Poverty: An Economic History of the Twentieth Century. Oxford: Oxford University Press, 1990.
MLA-referens (9:e uppl.)Pollard, Sidney. Wealth and Poverty: An Economic History of the Twentieth Century. Oxford University Press, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.