APA (7th ed.) Citation

Jermy, A. C., Simpson, D., & Oswald, P. H. (2007). Sedges of the British Isles (Third edition.). Botanical Society of the British Isles.

Chicago Style (17th ed.) Citation

Jermy, A. C., David Simpson, and P. H. Oswald. Sedges of the British Isles. Third edition. London: Botanical Society of the British Isles, 2007.

MLA (9th ed.) Citation

Jermy, A. C., et al. Sedges of the British Isles. Third edition. Botanical Society of the British Isles, 2007.