To cite multimode in publications use:

Ameijeiras-Alonso J, Crujeiras RM, Rodríguez-Casal A (2021). “multimode: An R Package for Mode Assessment.” Journal of Statistical Software, 97(9), 1–32. doi:10.18637/jss.v097.i09.

Corresponding BibTeX entry:

  @Article{,
    title = {{multimode}: An {R} Package for Mode Assessment},
    author = {Jose Ameijeiras-Alonso and Rosa M. Crujeiras and Alberto
      Rodr{\'i}guez-Casal},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {97},
    number = {9},
    pages = {1--32},
    doi = {10.18637/jss.v097.i09},
  }