To cite package ‘histogram’ in publications use:

Mildenberger T, Rozenholc Y, Zasada D (2019). histogram: Construction of Regular and Irregular Histograms with Different Options for Automatic Choice of Bins. R package version 0.0-25, https://github.com/thmild/histogram.

Corresponding BibTeX entry:

  @Manual{,
    title = {histogram: Construction of Regular and Irregular
      Histograms with Different Options for Automatic Choice of Bins},
    author = {Thoralf Mildenberger and Yves Rozenholc and David
      Zasada},
    year = {2019},
    note = {R package version 0.0-25},
    url = {https://github.com/thmild/histogram},
  }