To cite package ‘epicontacts’ in publications use:

  Nagraj V, Randhawa N, Campbell F et al. epicontacts: Handling,
  visualisation and analysis of epidemiological contacts [version 1;
  referees: 1 approved, 1 approved with reservations]. F1000Research
  2018, 7:566 (doi: 10.12688/f1000research.14492.1)

A BibTeX entry for LaTeX users is

  @Article{,
    author = {{V Nagraj} and {N Randhawa} and {F Campbell} and {T Crellen} and {B Sudre} and {T Jombart}},
    title = {{epicontacts: Handling, visualisation and analysis of epidemiological contacts [version 1; referees: 1 approved, 1 approved with reservations]}},
    journal = {F1000Research},
    volume = {7},
    year = {2018},
    number = {566},
    doi = {10.12688/f1000research.14492.1},
  }