To cite package ‘DACF’ in publications use:

  Liu Q, Wang L (2018). _DACF: Data Analysis with Ceiling and/or Floor
  Data_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=DACF>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {DACF: Data Analysis with Ceiling and/or Floor Data},
    author = {Qimin Liu and Lijuan Wang},
    year = {2018},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=DACF},
  }