To cite ecp in publications use:

Nicholas A. James, David S. Matteson (2013). ecp: An R Package for Nonparametric Multiple Change Point Analysis of Multivariate Data Technical report Cornell University.

Corresponding BibTeX entry:

  @TechReport{,
    title = {{ecp}: An R Package for Nonparametric Multiple Change
      Point Analysis of Multivariate Data},
    author = {Nicholas A. James and David S. Matteson},
    institution = {Cornell University},
    year = {2013},
  }