To cite quickpsy in publications use:

Linares D, López-Moliner J (2016). “quickpsy: An R Package to Fit Psychometric Functions for Multiple Groups.” The R Journal, 8(1), 122–131. https://doi.org/10.32614/RJ-2016-008.

Corresponding BibTeX entry:

  @Article{,
    title = {quickpsy: An R Package to Fit Psychometric Functions for
      Multiple Groups},
    author = {Daniel Linares and Joan López-Moliner},
    journal = {The R Journal},
    year = {2016},
    volume = {8},
    number = {1},
    pages = {122--131},
    url = {https://doi.org/10.32614/RJ-2016-008},
  }