To cite package ‘pdftables’ in publications use:

  Persson E (2016). _pdftables: Programmatic Conversion of PDF Tables_.
  R package version 0.1, , <https://github.com/expersso/pdftables>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pdftables: Programmatic Conversion of PDF Tables},
    author = {Eric Persson},
    year = {2016},
    note = {R package version 0.1, },
    url = {https://github.com/expersso/pdftables},
  }