To cite wbstats in publications use:

Jesse Piburn (2018). wbstats: Programmatic Access to the World Bank API. Oak Ridge National Laboratory. Oak Ridge, Tennessee. URL https://www.ornl.gov/division/csed/gist

Corresponding BibTeX entry:

  @Manual{,
    title = {wbstats: Programmatic Access to the World Bank API},
    author = {Jesse Piburn},
    organization = {Oak Ridge National Laboratory},
    address = {Oak Ridge, Tennessee},
    year = {2018},
    url = {https://www.ornl.gov/division/csed/gist},
  }