To cite spdep in publications use one or more of the following as appropriate:

Bivand, Roger S. and Wong, David W. S. (2018) Comparing implementations of global and local indicators of spatial association TEST, 27(3), 716-748. URL https://doi.org/10.1007/s11749-018-0599-x

Roger S. Bivand, Edzer Pebesma, Virgilio Gomez-Rubio, 2013. Applied spatial data analysis with R, Second edition. Springer, NY. http://www.asdar-book.org/

Corresponding BibTeX entries:

  @Article{,
    author = {Roger Bivand and David W. S. Wong},
    title = {Comparing implementations of global and local indicators
      of spatial association},
    journal = {TEST},
    year = {2018},
    volume = {27},
    number = {3},
    pages = {716--748},
    url = {https://doi.org/10.1007/s11749-018-0599-x},
  }
  @Book{,
    author = {Roger S. Bivand and Edzer Pebesma and Virgilio
      Gomez-Rubio},
    title = {Applied spatial data analysis with {R}, Second edition},
    year = {2013},
    publisher = {Springer, NY},
    url = {http://www.asdar-book.org/},
  }