Bache, Stefan Milton, and Hadley Wickham. 2014. Magrittr: A Forward-Pipe Operator for R.

Davies, Tilman M. 2016. The Book of R: A First Course in Programming and Statistics. San Francisco: No Starch Press.

Kross, Sean, Nick Carchedi, Bill Bauer, and Gina Grdina. 2019. Swirl: Learn R, in R.

Müller, Kirill. 2017. Here: A Simpler Way to Find Your Files.

Müller, Kirill, and Hadley Wickham. 2019. Tibble: Simple Data Frames.

Wickham, Hadley. 2017. Tidyverse: Easily Install and Load the ’Tidyverse’.

———. 2019. Stringr: Simple, Consistent Wrappers for Common String Operations.

Wickham, Hadley, and Jennifer Bryan. 2019. Readxl: Read Excel Files.

Wickham, Hadley, Romain François, Lionel Henry, and Kirill Müller. 2019. Dplyr: A Grammar of Data Manipulation.

Wickham, Hadley, Jim Hester, and Romain Francois. 2018. Readr: Read Rectangular Text Data.

Xie, Yihui. 2019a. Bookdown: Authoring Books and Technical Documents with R Markdown.

———. 2019b. Knitr: A General-Purpose Package for Dynamic Report Generation in R.

———. 2019c. Servr: A Simple Http Server to Serve Static Files or Dynamic Documents.

Zhu, Hao. 2019. KableExtra: Construct Complex Table with ’Kable’ and Pipe Syntax.