To cite beanplot in publications use:

Peter Kampstra (2008). Beanplot: A Boxplot Alternative for Visual Comparison of Distributions. Journal of Statistical Software, Code Snippets 28(1). 1-9. URL http://www.jstatsoft.org/v28/c01/.

Corresponding BibTeX entry:

  @Article{,
    title = {Beanplot: A Boxplot Alternative for Visual Comparison of
      Distributions},
    author = {Peter Kampstra},
    journal = {Journal of Statistical Software, Code Snippets},
    year = {2008},
    volume = {28},
    number = {1},
    pages = {1--9},
    url = {http://www.jstatsoft.org/v28/c01/},
  }