To cite package 'tweedie' in publications use:

Peter K Dunn (2013). tweedie: Tweedie exponential family models. R package version 2.1.7.

Corresponding BibTeX entry:

  @Manual{,
    title = {tweedie: Tweedie exponential family models},
    author = {Peter K Dunn},
    year = {2013},
    note = {R package version 2.1.7},
  }