Cita APA (7th ed.)

(1999). Purchasing power parities and real expenditures (1999 edition.). OECD.

Cita Chicago (17th ed.)

Purchasing Power Parities and Real Expenditures. 1999 edition. Paris, Cedex, France: OECD, 1999.

Cita MLA (9th ed.)

Purchasing Power Parities and Real Expenditures. 1999 edition. OECD, 1999.