Sell, P. D., & Murrell, G. (2009). Flora of Great Britain and Ireland. Cambridge University Press.

Sell, P. D., and Gina Murrell. Flora of Great Britain and Ireland. Cambridge [England] ; New York: Cambridge University Press, 2009.

Sell, P. D., and Gina Murrell. Flora of Great Britain and Ireland. Cambridge University Press, 2009.