To cite package ‘networkD3’ in publications use:

  Allaire J, Gandrud C, Russell K, Yetman C (2017). _networkD3: D3
  JavaScript Network Graphs from R_. R package version 0.4.9000, ,
  <https://github.com/christophergandrud/networkd3>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {networkD3: D3 JavaScript Network Graphs from R},
    author = {J.J. Allaire and Christopher Gandrud and Kenton Russell and CJ Yetman},
    year = {2017},
    note = {R package version 0.4.9000, 
},
    url = {https://github.com/christophergandrud/networkd3},
  }