To cite package ‘RTutor’ in publications use:

  Kranz S (2020). _RTutor: Interactive R problem sets with automatic
  testing of solutions and automatic hints_. R package version
  2020.11.25, <https://github.com/skranz/rtutor>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {RTutor: Interactive R problem sets with automatic testing of solutions
and automatic hints},
    author = {Sebastian Kranz},
    year = {2020},
    note = {R package version 2020.11.25},
    url = {https://github.com/skranz/rtutor},
  }

ATTENTION: This citation information has been auto-generated from the
package DESCRIPTION file and may need manual editing, see
‘help("citation")’.