Παραπομπή APA

Amartya Sen. (1980). Levels of poverty: Policy and change. World bank staff.

Παραπομπή Chicago Style

Amartya Sen. Levels of Poverty: Policy and Change. U S A: World bank staff, 1980.

Παραπομπή MLA

Amartya Sen. Levels of Poverty: Policy and Change. World bank staff, 1980.