To cite idendro/idendr0 in publications use:

  Tomas Sieger, Catherine B. Hurley, Karel Fiser, Claudia Beleites
  (2017). Interactive Dendrograms: The R Packages idendro and idendr0.
  Journal of Statistical Software, 76(10), 1-22.
  doi:10.18637/jss.v076.i10

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Interactive Dendrograms: The {R} Packages {idendro} and {idendr0}},
    author = {Tom\'a\v{s} Sieger and Catherine B. Hurley and Karel Fi\v{s}er and Claudia Beleites},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {76},
    number = {10},
    pages = {1--22},
    doi = {10.18637/jss.v076.i10},
  }