To cite NAM in publications use:

Xavier A, Xu S, Muir WM, Rainey KM. NAM: association studies in multiple populations. Bioinformatics 31(23):3862-3864.

Corresponding BibTeX entry:

  @Article{,
    title = {{NAM}: association studies in multiple populations},
    author = {Alencar Xavier and Shizhong Xu and William Muir and Katy
      Rainey},
    journal = {Bioinformatics},
    publisher = {Oxford University Press},
    volume = {31},
    number = {23},
    pages = {3862-3864},
    year = {2015},
  }