To cite HSAR Package in publications use:

Dong, Guanpeng, Harris, Richard (2014). “Spatial Autoregressive Models for Geographically Hierarchical Data Structures.” Geographical Analysis, 47(2), 173–191. doi:10.1111/gean.12049.

Corresponding BibTeX entry:

  @Article{,
    title = {Spatial Autoregressive Models for Geographically
      Hierarchical Data Structures},
    journal = {Geographical Analysis},
    volume = {47},
    number = {2},
    pages = {173–191},
    year = {2014},
    publisher = {Wiley},
    author = {{Dong} and {Guanpeng} and {Harris} and {Richard}},
    doi = {10.1111/gean.12049},
  }