To cite 'correlation' in publications use:

Makowski D, Ben-Shachar M, Patil I, Lüdecke D (2020). “Methods for Correlation Analysis.” CRAN. https://github.com/easystats/correlation.

Corresponding BibTeX entry:

  @Article{,
    title = {Methods for Correlation Analysis.},
    author = {Dominique Makowski and Mattan S. Ben-Shachar and
      Indrajeet Patil and Daniel Lüdecke},
    journal = {CRAN},
    year = {2020},
    url = {https://github.com/easystats/correlation},
  }