To cite package ‘corona’ in publications use:

  van Schalkwyk J (2020). _corona: Coronavirus ('Rona') Data
  Exploration_. R package version 0.3.0,
  <https://CRAN.R-project.org/package=corona>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {corona: Coronavirus ('Rona') Data Exploration},
    author = {Jo {van Schalkwyk}},
    year = {2020},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=corona},
  }