APA (7th ed.) Citation

Opello, W. C. (1991). Portugal: From monarchy to pluralist democracy. Westview Press.

Chicago Style (17th ed.) Citation

Opello, Walter C. Portugal: From Monarchy to Pluralist Democracy. Boulder: Westview Press, 1991.

MLA (9th ed.) Citation

Opello, Walter C. Portugal: From Monarchy to Pluralist Democracy. Westview Press, 1991.

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