To cite SwimmeR in publications use:

Pilgrim GA (2019). SwimmeR: Package for working with Swimming Data. https://github.com/gpilgrim2670/SwimmeR.

Corresponding BibTeX entry:

  @Manual{,
    title = {{SwimmeR}: {P}ackage for working with Swimming Data},
    author = {Gregory A. Pilgrim},
    year = {2019},
    url = {https://github.com/gpilgrim2670/SwimmeR},
  }