To cite surveydown in publications use:

Helveston J, Hu P, Bunea B (2024). surveydown: Markdown-Based Surveys Using Quarto And Shiny. R package, https://surveydown.org/.

Corresponding BibTeX entry:

  @Manual{,
    title = {surveydown: Markdown-Based Surveys Using Quarto And
      Shiny},
    author = {John Paul Helveston and Pingfan Hu and Bogdan Bunea},
    year = {2024},
    note = {R package},
    url = {https://surveydown.org/},
  }