To cite the 'tinytex' package in publications use:

Xie Y (2019). tinytex: Helper Functions to Install and Maintain 'TeX Live', and Compile 'LaTeX' Documents. R package version 0.17, https://github.com/yihui/tinytex.

Xie Y (2019). “TinyTeX: A lightweight, cross-platform, and easy-to-maintain LaTeX distribution based on TeX Live.” TUGboat, 30–32. http://tug.org/TUGboat/Contents/contents40-1.html.

Corresponding BibTeX entries:

  @Manual{,
    title = {tinytex: Helper Functions to Install and Maintain 'TeX
      Live', and Compile 'LaTeX' Documents},
    author = {Yihui Xie},
    year = {2019},
    note = {R package version 0.17},
    url = {https://github.com/yihui/tinytex},
  }
  @Article{,
    title = {TinyTeX: A lightweight, cross-platform, and
      easy-to-maintain LaTeX distribution based on TeX Live},
    author = {Yihui Xie},
    journal = {TUGboat},
    year = {2019},
    volumne = {40},
    number = {1},
    pages = {30--32},
    url = {http://tug.org/TUGboat/Contents/contents40-1.html},
  }