To cite 'deseasonalize' in publications use:

A. I. McLeod and Hyukjun Gweon (2012). Optimal Deseasonalization for Monthly and Daily Geophysical Time Series Journal of Environmental Statistics 4(11). URL http://www.jenvstat.org/v04/i11

Corresponding BibTeX entry:

  @Article{,
    title = {Optimal Deseasonalization for Monthly and Daily
      Geophysical Time Series},
    author = {A. I. McLeod and Hyukjun Gweon},
    journal = {Journal of Environmental Statistics},
    year = {2013},
    volume = {4},
    number = {11},
    url = {http://www.jenvstat.org/v04/i11},
  }