To cite package ‘IPMbook’ in publications use:

  Schaub M, Kéry M, Meredith M (2023). _IPMbook: Functions and Data for
  the Book 'Integrated Population Models'_. R package version 0.1.5,
  <https://github.com/kenkellner/ipmbook>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {IPMbook: Functions and Data for the Book 'Integrated Population Models'},
    author = {Michael Schaub and Marc Kéry and Mike Meredith},
    year = {2023},
    note = {R package version 0.1.5},
    url = {https://github.com/kenkellner/ipmbook},
  }