To cite package ‘peditools2’ in publications use:

  Chou JH, Roumiantsev S, Singh R. PediTools Electronic Growth Chart
  Calculators: Applications in Clinical Care, Research, and Quality
  Improvement. J Med Internet Res. 2020;22(1):e16204. doi:10.2196/16204

A BibTeX entry for LaTeX users is

  @Article{,
    title = {PediTools Electronic Growth Chart Calculators: Applications in Clinical Care, Research, and Quality Improvement},
    author = {Joseph H. Chou and S. Roumiantsev and R. Singh},
    journal = {Journal of Medical Internet Research},
    year = {2020},
    volume = {22},
    number = {1},
    pages = {e16204},
    doi = {10.2196/16204},
  }