To cite epinet in publications use:

  Groendyke C, Welch D (2018). “epinet: An R Package to Analyze
  Epidemics Spread across Contact Networks.” _Journal of Statistical
  Software_, *83*(11), 1-22. doi:10.18637/jss.v083.i11
  <https://doi.org/10.18637/jss.v083.i11>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{epinet}: An {R} Package to Analyze Epidemics Spread across Contact Networks},
    author = {Chris Groendyke and David Welch},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {83},
    number = {11},
    pages = {1--22},
    doi = {10.18637/jss.v083.i11},
  }