Dyfyniad APA

Ravallion,Martin. (1998). Poverty lines in theory and practice. The world Bank.

Dyfyniad Arddull Chicago

Ravallion,Martin. Poverty Lines in Theory and Practice. Washington: The world Bank, 1998.

Dyfyniad MLA

Ravallion,Martin. Poverty Lines in Theory and Practice. The world Bank, 1998.

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