To cite exactci in publications use:

  Fay MP (2010). “Two-sided Exact Tests and Matching Confidence
  Intervals for Discrete Data.” _R Journal_, *2*(1), 53-58.
  <https://journal.R-project.org/>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Two-sided Exact Tests and Matching Confidence Intervals for Discrete Data},
    author = {Michael P. Fay},
    journal = {R Journal},
    year = {2010},
    volume = {2},
    number = {1},
    pages = {53--58},
    url = {https://journal.R-project.org/},
  }