APA (7th ed.) Citation

BELFORD, Dunford, & Woolfrey. (2003). The rough guide to Italy. Rough Guides.

Chicago Style (17th ed.) Citation

BELFORD, Dunford, and Woolfrey. The Rough Guide to Italy. London: Rough Guides, 2003.

MLA (9th ed.) Citation

BELFORD, et al. The Rough Guide to Italy. Rough Guides, 2003.