To cite package ‘VennItem’ in publications use:

  Jackson-Wood M (2026). _VennItem: Generate Venn Diagrams with Items
  Listed in the Sections_. R package version 1.1.0,
  <https://github.com/microbialman/vennitem>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {VennItem: Generate Venn Diagrams with Items Listed in the Sections},
    author = {Matthew Jackson-Wood},
    year = {2026},
    note = {R package version 1.1.0},
    url = {https://github.com/microbialman/vennitem},
  }