APA (7th ed.) Citation

OECD. (1991). OECD economic surveys: Portugal. OECD.

Chicago Style (17th ed.) Citation

OECD. OECD Economic Surveys: Portugal. France: OECD, 1991.

MLA (8th ed.) Citation

OECD. OECD Economic Surveys: Portugal. OECD, 1991.

Warning: These citations may not always be 100% accurate.