To cite btergm in publications use:

Leifeld P, Cranmer SJ and Desmarais BA (2018). “Temporal Exponential Random Graph Models with btergm: Estimation and Bootstrap Confidence Intervals.” Journal of Statistical Software, 83(6), pp. 1–36. doi: 10.18637/jss.v083.i06.

Corresponding BibTeX entry:

  @Article{,
    title = {Temporal Exponential Random Graph Models with {btergm}:
      Estimation and Bootstrap Confidence Intervals},
    author = {Philip Leifeld and Skyler J. Cranmer and Bruce A.
      Desmarais},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {83},
    number = {6},
    pages = {1--36},
    doi = {10.18637/jss.v083.i06},
  }