To cite package 'learnrbook' in publications, please use:

Aphalo, Pedro J. (2017) Learn R ...as you learnt your mother tongue. Leanpub. <https://leanpub.com/learnr>.

Corresponding BibTeX entry:

  @Book{,
    author = {Pedro J. Aphalo},
    title = {Learn R ...as you learnt your mother tongue},
    publisher = {Leanpub},
    pages = {522},
    year = {2017},
    url = {https://leanpub.com/learnr},
  }