To cite stream in publications use:

Michael Hahsler, Matthew Bolanos, John Forrest (2017). Introduction to stream: An Extensible Framework for Data Stream Clustering Research with R. Journal of Statistical Software, 76(14), 1-50.<doi:10.18637/jss.v076.i14>

Corresponding BibTeX entry:

  @Article{,
    title = {Introduction to {stream}: An Extensible Framework for Data
      Stream Clustering Research with {R}},
    author = {Michael Hahsler and Matthew Bola{\~n}os and John
      Forrest},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {76},
    number = {14},
    pages = {1--50},
    doi = {10.18637/jss.v076.i14},
  }