To cite package ‘MedDietCalc’ in publications use:

  Menendez M (2019). _MedDietCalc: Multi Calculator to Compute Scores
  of Adherence to Mediterranean Diet_. R package version 0.1.1,
  <https://CRAN.R-project.org/package=MedDietCalc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {MedDietCalc: Multi Calculator to Compute Scores of Adherence to Mediterranean
Diet},
    author = {Miguel Menendez},
    year = {2019},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=MedDietCalc},
  }