Sen, A. (1980). Level of poverty: Policy and change - a background study for world development report 1980. World Bank publication.
استشهاد بنمط شيكاغوSen, Amartya. Level of Poverty: Policy and Change - a Background Study for World Development Report 1980. USA: World Bank publication, 1980.
MLA استشهادSen, Amartya. Level of Poverty: Policy and Change - a Background Study for World Development Report 1980. World Bank publication, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.