@misc{30,
  author = {Hill Mark O and Baker Richard and Broad G. R. and Chandler P.J. and Copp G.H. and Ellis J. and Jones D. and Hoyland C. and Laing I. and Longshaw M. and Moore N. and Parrott Dave and Pearman David A. and Preston Christopher D. and Smith R.M. and Waters R.},
  title = {Audit of non-native species in England},
  year = {2005},
  publisher = {English Nature},
  address = {Peterborough},
  issn = {ENRR662},
  url = {http://publications.naturalengland.org.uk/publication/98016},
  language = {eng},
}