To cite package ‘miniUI’ in publications use:

  Cheng J (2018). _miniUI: Shiny UI Widgets for Small Screens_. R
  package version 0.1.1.1, <https://CRAN.R-project.org/package=miniUI>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {miniUI: Shiny UI Widgets for Small Screens},
    author = {Joe Cheng},
    year = {2018},
    note = {R package version 0.1.1.1},
    url = {https://CRAN.R-project.org/package=miniUI},
  }