To cite 'multiverse' in publications use:

  Sarma, A., Kale, A., Moon, M., Taback, N., Chevalier, F., Hullman,
  J., & Kay, M. (2021, April 11). multiverse: Multiplexing Alternative
  Data Analyses in R Notebooks. https://doi.org/10.31219/osf.io/yfbwm
  Available from https://github.com/MUCollective/multiverse.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {multiverse: Multiplexing Alternative Data Analyses in R Notebooks (Version 0.6.2)},
    author = {Abhraneel Sarma and Alex Kale and Michael Moon and Nathan Taback and Fanny Chevalier and Jessica Hullman and Matthew Kay},
    year = {2021},
    url = {https://github.com/MUCollective/multiverse},
    journal = {OSF Preprints},
  }