To cite package ‘fishkirkko2015’ in publications use:

Gama J (2016). fishkirkko2015: Dataset of Measurements of Fish Species at Kirkkojarvi Lake, Finland. R package version 1.0.0, https://CRAN.R-project.org/package=fishkirkko2015.

Corresponding BibTeX entry:

  @Manual{,
    title = {fishkirkko2015: Dataset of Measurements of Fish Species at
      Kirkkojarvi Lake, Finland},
    author = {Jose Gama},
    year = {2016},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=fishkirkko2015},
  }