To cite RepeatABEL in publications use:

  Lars Ronnegard, S. Eryn McFarlane, Arild Husby, Takeshi Kawakami,
  Hans Ellegren and Anna Qvarnstrom (2016) Increasing the power of
  genome wide association studies in natural populations using repeated
  measures: evaluation and implementation. Methods in Ecology and
  Evolution, 7:792-799.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Increasing the power of genome wide association studies in natural populations using repeated measures: evaluation and implementation},
    author = {Lars Ronnegard and S. Eryn McFarlane and Arild Husby and Takeshi Kawakami and Hans Ellegren and Anna Qvarnstrom},
    journal = {Methods in Ecology and Evolution},
    year = {2016},
    volume = {7},
    number = {7},
    pages = {792-799},
  }

  GenABEL project developers (2013). GenABEL: genome-wide SNP
  association analysis. R package version 1.8-0.
  https://cran.r-project.org/package=GenABEL

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {GenABEL: genome-wide SNP association analysis},
    author = {GenABEL project developers},
    year = {2013},
    note = {R package version 1.8-0},
    url = {https://cran.r-project.org/package=GenABEL},
  }