To cite in publications use:

R. K. S. Hankin 2015. Numerical evaluation of the Gauss hypergeometric function with the `hypergeo` package The R journal 7(2):81-88

Corresponding BibTeX entry:

  @Article{,
    title = {Numerical evaluation of the Gauss hypergeometric function
      with the `hypergeo` package},
    author = {{Robin K. S. Hankin}},
    journal = {The R Journal},
    year = {2015},
    volume = {7},
    issue = {2},
    pages = {81--88},
  }