To cite glottospace in publications use:

Norder S (????). “glottospace: R package for the geospatial analysis of linguistic and cultural data.” Manuscript under preparation, https://github.com/SietzeN/glottospace.

Corresponding BibTeX entry:

  @Unpublished{,
    title = {glottospace: R package for the geospatial analysis of
      linguistic and cultural data},
    author = {Sietze Norder},
    note = {Manuscript under preparation},
    url = {https://github.com/SietzeN/glottospace},
  }