To cite the 'blogdown' package in publications use:

Yihui Xie (2018). blogdown: Create Blogs and Websites with R Markdown. R package version 0.5.

Yihui Xie, Alison Presmanes Hill, and Amber Thomas (2017). blogdown: Creating Websites with R Markdown. Chapman and Hall/CRC. ISBN 978-0815363729

Corresponding BibTeX entries:

  @Manual{,
    title = {blogdown: Create Blogs and Websites with R Markdown},
    author = {Yihui Xie},
    year = {2018},
    note = {R package version 0.5},
    url = {https://github.com/rstudio/blogdown},
  }
  @Book{,
    title = {blogdown: Creating Websites with {R} Markdown},
    author = {Yihui Xie and Alison Presmanes Hill and Amber Thomas},
    publisher = {Chapman and Hall/CRC},
    address = {Boca Raton, Florida},
    year = {2017},
    note = {ISBN 978-0815363729},
    url = {https://github.com/rstudio/blogdown},
  }