To cite quickmapr:

Hollister, J.W. (2015). quickmapr: Quickly map and explore spatial data. CRAN v0.010. 10.5281/zenodo.32971

Corresponding BibTeX entry:

  @Manual{,
    author = {Jeffrey W. Hollister},
    title = {quickmapr: Quickly map and explore spatial data},
    year = {2015},
    note = {R package version 0.1.0, doi: 10.5281/zenodo.32971},
    url = {http://github.com/jhollist/quickmapr},
  }