APA (7th ed.) Citation

Brown, J., John Fisher, & Mark Ellingham. (2005). The rough guide to Portugal. Rough guides.

Chicago Style (17th ed.) Citation

Brown, Jules, John Fisher, and Mark Ellingham. The Rough Guide to Portugal. London: Rough guides, 2005.

MLA (9th ed.) Citation

Brown, Jules, et al. The Rough Guide to Portugal. Rough guides, 2005.