To cite spaMM in publications use:

Rousset F, Ferdy J (2014). “Testing environmental and genetic effects in the presence of spatial autocorrelation.” Ecography, 37(8), 781-790. http://dx.doi.org/10.1111/ecog.00566.

Corresponding BibTeX entry:

  @Article{,
    title = {Testing environmental and genetic effects in the presence
      of spatial autocorrelation},
    author = {Fran├žois Rousset and Jean-Baptiste Ferdy},
    journal = {Ecography},
    year = {2014},
    volume = {37},
    number = {8},
    pages = {781-790},
    url = {http://dx.doi.org/10.1111/ecog.00566},
  }