To cite package 'MODISTools' in publications use:

Tuck SL, Phillips HR, Hintzen RE, Scharlemann JP, Purvis A, Hudson LN (2014). “MODISTools – downloading and processing MODIS remotely sensed data in R.” Ecology and Evolution, 4(24), 4658–4668. doi: 10.1002/ece3.1273, http://onlinelibrary.wiley.com/doi/10.1002/ece3.1273/full.

Corresponding BibTeX entry:

  @Article{,
    title = {MODISTools -- downloading and processing MODIS remotely
      sensed data in R},
    year = {2014},
    author = {Sean L. Tuck and Helen R.P. Phillips and Rogier E.
      Hintzen and J{"o}rn P.W. Scharlemann and Andy Purvis and Lawrence
      N. Hudson},
    journal = {Ecology and Evolution},
    volume = {4},
    number = {24},
    pages = {4658--4668},
    doi = {10.1002/ece3.1273},
    keywords = {Conservation biology, earth observation, global change,
      land processes, macroecology, PREDICTS, remote-sensing, satellite
      imagery},
    url = {http://onlinelibrary.wiley.com/doi/10.1002/ece3.1273/full},
  }