To cite package `RRHO` in publications use:

  Jonathan D. Rosenblatt and Jason L. Stein (2014). RRHO: Test overlap
  using the Rank-Rank Hypergeometric test. R package version 1.45.0.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {RRHO: Test overlap using the Rank-Rank Hypergeometric test},
    author = {Jonathan D. Rosenblatt and Jason L. Stein},
    year = {2014},
    note = {R package version 1.45.0},
  }