To cite package ‘declared’ in publications use:

Dusa A (2026). declared: Functions for Declared Missing Values. R package version 0.26.8, https://github.com/dusadrian/declared.

Corresponding BibTeX entry:

  @Manual{,
    title = {declared: Functions for Declared Missing Values},
    author = {Adrian Dusa},
    year = {2026},
    note = {R package version 0.26.8},
    url = {https://github.com/dusadrian/declared},
  }