To cite package ‘ILSAmerge’ in publications use:

  Christiansen A (2024). _ILSAmerge: Merge and Download International
  Large-Scale Assessments (ILSA) Data_. R package version 1.2.6, ,
  <https://github.com/dopatendo/ilsamerge>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ILSAmerge: Merge and Download International Large-Scale Assessments (ILSA)
Data},
    author = {Andrés Christiansen},
    year = {2024},
    note = {R package version 1.2.6, 
},
    url = {https://github.com/dopatendo/ilsamerge},
  }