APA (7th ed.) Citation

Anderson, B., & Anderson, E. (1997). Lisbon & central Portugal. Passport Books.

Chicago Style (17th ed.) Citation

Anderson, Brian, and Eileen Anderson. Lisbon & Central Portugal. Lincolnwood, Ill: Passport Books, 1997.

MLA (9th ed.) Citation

Anderson, Brian, and Eileen Anderson. Lisbon & Central Portugal. Passport Books, 1997.