To cite trimr in publications use:

Grange, J.A. (2018). trimr: An implementation of common response time trimming methods. R Package Version 1.1.0. URL https://cran.r-project.org/web/packages/trimr/index.html

Corresponding BibTeX entry:

  @Manual{,
    title = {trimr: An implementation of common response time trimming
      methods.},
    author = {James A Grange},
    year = {2018},
    note = {R package version 1.1.0.},
    url = {https://cran.r-project.org/web/packages/trimr/index.html},
  }