APA (7th ed.) Citation

Simonis, D., Johnstone, S., & Williams, N. (2006). Switzerland. Lonet Planet Offices.

Chicago Style (17th ed.) Citation

Simonis, Damien, Sarah Johnstone, and Nicola Williams. Switzerland. London: Lonet Planet Offices, 2006.

MLA (9th ed.) Citation

Simonis, Damien, et al. Switzerland. Lonet Planet Offices, 2006.