To cite learnPopGen in publication use:

Revell, L. J. (In press) learnPopGen: an R package for population genetic simulation and numerical analysis. Ecology and Evolution.

As learnPopGen is continually evolving, you may want to cite its version number. Find it with 'help(package=learnPopGen)'.

Corresponding BibTeX entry:

  @Article{,
    title = {learnPopGen: an R package for population genetic
      simulation and numerical analysis.},
    author = {Liam J. Revell},
    journal = {Ecology and Evolution},
    year = {2019},
  }