To cite sdstudio in publications use:

Hu P, Helveston J, Bunea B (2025). sdstudio: Companion GUI for the surveydown survey platform. R package, https://surveydown.org/.

Corresponding BibTeX entry:

  @Manual{,
    title = {sdstudio: Companion GUI for the surveydown survey
      platform},
    author = {Pingfan Hu and John Paul Helveston and Bogdan Bunea},
    year = {2025},
    note = {R package},
    url = {https://surveydown.org/},
  }