To cite geoCount in publications use:

Liang Jing, Victor De Oliveira (2015). geoCount: An R Package for the Analysis of Geostatistical Count Data. Journal of Statistical Software, 63(11), 1-33. URL http://www.jstatsoft.org/v63/i11/.

Corresponding BibTeX entry:

  @Article{,
    title = {{geoCount}: An {R} Package for the Analysis of
      Geostatistical Count Data},
    author = {Liang Jing and Victor {De Oliveira}},
    journal = {Journal of Statistical Software},
    year = {2015},
    volume = {63},
    number = {11},
    pages = {1--33},
    url = {http://www.jstatsoft.org/v63/i11/},
  }