United Nations Development Programme. (1991). Human development report 1991. Oxford University Press for the U.N.D.P..
Citazione stile Chigago Style (17a edizione)United Nations Development Programme. Human Development Report 1991. New York: Oxford University Press for the U.N.D.P., 1991.
Citatione MLA (8a ed.)United Nations Development Programme. Human Development Report 1991. Oxford University Press for the U.N.D.P., 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.