To cite in publications use:

Hankin RK (2007). “Introducing untb, an R package for simulating ecological drift under the unified nuetral theory of biodiversity.” Journal of Statistical Software, 22.

Corresponding BibTeX entry:

  @Article{,
    title = {Introducing untb, an R package for simulating ecological
      drift under the unified nuetral theory of biodiversity},
    author = {Robin K. S. Hankin},
    journal = {Journal of Statistical Software},
    year = {2007},
    month = {September},
    volume = {22},
    issue = {12},
  }