Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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