To cite demogR in publications use:

Jones JH (2007). “demogR: A Package for the Construction and Analysis of Age-structured Demographic Models in R.” Journal of Statistical Software, 22(10), 1–28. http://dx.doi.org/10.18637/jss.v022.i10.

Corresponding BibTeX entry:

  @Article{,
    title = {{demogR}: A Package for the Construction and Analysis of
      Age-structured Demographic Models in {R}},
    author = {James Holland Jones},
    journal = {Journal of Statistical Software},
    year = {2007},
    volume = {22},
    number = {10},
    pages = {1--28},
    url = {http://dx.doi.org/10.18637/jss.v022.i10},
  }