To cite package ‘powerEQTL’ in publications use:

  Dong X, Chang T, Weiss S, Qiu W (2017). _powerEQTL: Power and Sample
  Size Calculation for eQTL Analysis_. R package version 0.1.3,
  <https://github.com/sterding/powereqtl>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {powerEQTL: Power and Sample Size Calculation for eQTL Analysis},
    author = {Xianjun Dong and Tzuu-Wang Chang and Scott T. Weiss and Weiliang Qiu},
    year = {2017},
    note = {R package version 0.1.3},
    url = {https://github.com/sterding/powereqtl},
  }