To cite in publications use:

Bill Venables and Kurt Hornik (2015). oz: Plot the Australian Coastline and States. R package version 1.0-20.

Corresponding BibTeX entry:

  @Manual{,
    title = {oz: Plot the Australian Coastline and States},
    author = {Bill Venables and Kurt Hornik},
    year = {2015},
    note = {R package version 1.0-20. S original by Bill Venables, R
      port by Kurt Hornik.},
    url = {http://CRAN.R-project.org/package=oz},
  }