APA (7th ed.) Citation

Marsh, K. (2005). The good bird guide: A species-by-species guide to finding Europe's best birds. Helm.

Chicago Style (17th ed.) Citation

Marsh, Keith. The Good Bird Guide: A Species-by-species Guide to Finding Europe's Best Birds. London: Helm, 2005.

MLA (9th ed.) Citation

Marsh, Keith. The Good Bird Guide: A Species-by-species Guide to Finding Europe's Best Birds. Helm, 2005.