To cite package ‘puzzle’ in publications use:

Barriere O, Gonzalez Sales M (2019). puzzle: Assembling Data Sets for Non-Linear Mixed Effects Modeling. R package version 0.0.1, https://github.com/syneoshealth/puzzle.

Corresponding BibTeX entry:

  @Manual{,
    title = {puzzle: Assembling Data Sets for Non-Linear Mixed Effects
      Modeling},
    author = {Olivier Barriere and Mario {Gonzalez Sales}},
    year = {2019},
    note = {R package version 0.0.1},
    url = {https://github.com/syneoshealth/puzzle},
  }