To cite package ‘insight’ in publications use:

  Lüdecke D, Waggoner P, Makowski D (2019). “insight: A Unified
  Interface to Access Information from Model Objects in R.” _Journal of
  Open Source Software_, *4*(38), 1412. doi:10.21105/joss.01412
  <https://doi.org/10.21105/joss.01412>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{insight}: A Unified Interface to Access Information from Model Objects in {R}.},
    volume = {4},
    doi = {10.21105/joss.01412},
    number = {38},
    journal = {Journal of Open Source Software},
    author = {Daniel Lüdecke and Philip Waggoner and Dominique Makowski},
    year = {2019},
    pages = {1412},
  }